CN210545058U - Multi-port glass reactor - Google Patents
Multi-port glass reactor Download PDFInfo
- Publication number
- CN210545058U CN210545058U CN201920957576.5U CN201920957576U CN210545058U CN 210545058 U CN210545058 U CN 210545058U CN 201920957576 U CN201920957576 U CN 201920957576U CN 210545058 U CN210545058 U CN 210545058U
- Authority
- CN
- China
- Prior art keywords
- flask
- ground
- reaction
- jacket
- flask main
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000011521 glass Substances 0.000 title claims abstract description 30
- 238000006243 chemical reaction Methods 0.000 claims abstract description 83
- 238000007789 sealing Methods 0.000 claims description 8
- 239000012295 chemical reaction liquid Substances 0.000 abstract description 28
- 238000005096 rolling process Methods 0.000 abstract description 7
- 238000002474 experimental method Methods 0.000 abstract description 4
- 230000008676 import Effects 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 description 8
- 238000003756 stirring Methods 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 6
- 238000001816 cooling Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000011344 liquid material Substances 0.000 description 1
- 238000003760 magnetic stirring Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 210000000707 wrist Anatomy 0.000 description 1
Images
Landscapes
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The utility model relates to a glass reactor technical field discloses a many mouthfuls of glass reactors, including the flask main part, flask main part upper portion is provided with first mill mouthful group, and flask main part side is provided with second mill mouthful group, and the outside cover of flask main part is equipped with and presss from both sides the cover, presss from both sides cover upper end and flask main part surface seal set up and rather than be provided with the cavity between the surface, is provided with import and export and all communicates with the cavity on pressing from both sides the cover, second mill mouthful group runs through and presss from both sides the cover and seal the setting in both junctions. The utility model discloses can realize preventing that reaction liquid from taking place rolling purpose after the ground mouth of middle part flows and prevents that the flask from turning on one's side, make experiment reaction convenient operation, simultaneously safer, practical.
Description
Technical Field
The utility model relates to the technical field of glass reactors, in particular to a multi-port glass reactor.
Background
Glass reactors are commonly used in chemical experiments as flasks, which are used to hold liquid materials, usually having a flat bottom and a round bottom, usually having the appearance of a round, narrow neck. Clearly different from a beaker. The narrow opening is used for preventing the solution from splashing or reducing the evaporation of the solution, and can be matched with a rubber plug for connecting other glass equipment. When the solution requires a long reaction time or heating reflux, a flask is generally selected as the vessel. The flask is not suitable for glass rod stirring because the bottleneck is very narrow, and can be smoothly and uniformly stirred by slightly turning the wrist by holding the bottleneck when stirring is needed. If heating and refluxing, magnetic stirring bar can be put in the bottle to heat the stirrer for stirring.
Current flask all can be provided with a plurality of grinds mouths for satisfying the experiment demand, if three-neck or four-neck flask, the grind mouth of flask all sets up the upper portion at the flask under the normal conditions, for satisfying the stirring demand, one of them grind mouth is located the top of flask middle part promptly, when empting reaction liquid, because there is certain reaction liquid in the tensile middle part grind mouth four weeks of liquid, if the reaction liquid volume is less in the flask, at the inclination increase of empting in-process flask, make middle part grind mouth have the reaction liquid outflow, when reaction liquid has strong corrosivity, can injure the operator, and because the grind mouth is all in the upper portion, can lead to the flask very easily to roll after turning on one's side, cause the flask damaged.
SUMMERY OF THE UTILITY MODEL
Based on the above problem, the utility model provides a many mouthfuls of glass reactors. The utility model discloses can realize preventing that reaction liquid from flowing from the middle part mill mouth to prevent that the flask from taking place rolling purpose after turning on one's side, through set up second mill mouthful group to the side of the flask main part, the outside cover of flask main part is established and is pressed from both sides the cover, has solved current glass reactor when empting reaction liquid, and liquid easily flows from the middle part mill mouth and easily rolls after turning on one's side the problem.
For solving the above technical problem, the utility model discloses a technical scheme as follows:
the utility model provides a many mouthfuls of glass reactors, includes the flask main part, flask main part upper portion is provided with first ground mouthful group, flask main part side is provided with second ground mouthful group, the outside cover of flask main part is equipped with the cover, press from both sides cover upper end and flask main part surface seal setting and rather than be provided with the cavity between the surface, be provided with import and export on the cover and all communicate with the cavity, second ground mouthful group runs through the cover and seals the setting at both junctions.
In the utility model, the reaction liquid can be added or the stirring device or the temperature detecting device can be connected through the first ground mouth group positioned on the upper part of the flask main body, the reaction liquid or other devices can also be added through the second ground mouth group positioned on the side surface of the flask main body, the unused ground mouth group can be sealed through a rubber plug or a hollow glass plug, because the second ground mouth group is arranged on the side surface of the flask main body, namely, a certain distance is reserved between the second ground mouth group and the first ground mouth group, when the reaction liquid is poured, the position of the second ground mouth group is lower, namely, the reaction liquid is only discharged through the second ground mouth group, the problem that the reaction liquid partially infects on the outer wall of the flask main body due to the fact that the reaction liquid flows out from a plurality of ground mouths simultaneously, which leads to the easy damage to operators is avoided, and after the first ground mouth group is arranged on the side surface of the flask main body, when the flask turns on one side, the first ground mouth group can play the purpose of blocking, the reaction is precisely controlled and is more flexibly used due to the constant system temperature by introducing cold and heat sources (cold water, hot oil and the like) into the jacket for circular heating or cooling reaction, the jacket can be made of glass which is the same as the flask main body due to the heating of the flask main body, and the joint of the second ground group and the jacket can be sealed by adopting a sealant or a sealing ring.
The utility model discloses can realize preventing that reaction liquid from flowing from the middle part mill mouth to prevent that the flask from taking place rolling purpose after turning on one's side, through set up second mill mouthful group to the side of the flask main part, the outside cover of flask main part is established and is pressed from both sides the cover, has solved current glass reactor when empting reaction liquid, and liquid easily flows from the middle part mill mouth and easily rolls after turning on one's side the problem.
In a preferred mode, the flask main body comprises an upper reaction cover and a lower reaction container which are detachably and hermetically arranged, the first ground group is positioned on the upper reaction cover, and the second ground group is positioned on the lower reaction container.
In a preferred mode, the jacket is sleeved on the lower reaction vessel, and the upper end of the jacket is hermetically arranged with the outer surface of the lower reaction vessel.
In a preferred mode, the first ground set is at least provided with one ground, one ground is positioned in the middle of the flask main body, and the second ground set is at least provided with one ground.
Preferably, the outlet and the inlet are respectively positioned at two sides of the jacket and distributed up and down.
In a preferred mode, the upper reaction cover is connected with the lower reaction vessel by screw threads.
As a preferred mode, the upper reaction cover and the lower reaction vessel are both sleeved with flange rings and fixedly connected through bolts, and sealing rings are arranged at the connection positions of the upper reaction cover and the lower reaction vessel.
In a preferred mode, the bottom of the lower reaction vessel is formed in a semicircular arc shape.
In a preferred mode, the lower reaction vessel is provided in a cylindrical shape and chamfered at the bottom thereof.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the utility model discloses can realize preventing that reaction liquid from grinding the mouth from flowing from the middle part, and prevent that the flask from taking place rolling purpose after turning on one's side, grind a mouthful group through set up the second in flask main part side, the clamp cover is established to the outside cover of flask main part, solved current glass reactor when empting reaction liquid, liquid easily flows and easily rolls problem after turning on one's side from the middle part grinding the mouth, through letting in logical cold and heat sources (cold water, hot oil etc.) circulation heating or cooling reaction in to the clamp cover, system constancy of temperature makes the reaction accurate, and easy control makes experiment reaction convenient operation, and is simultaneously safer, and practical.
(2) The utility model discloses well flask main part is including adopting upper portion reaction lid and the lower part reaction vessel that can dismantle sealed setting, first mill mouthful group is located upper portion reaction lid, second mill mouthful group is located lower part reaction vessel, through adopting upper portion reaction lid and lower part reaction vessel and can dismantle sealed setting for the washing of flask main part is more convenient, and traditional flask adopts integrated into one piece, and grinds the mouth diameter less, and it is very inconvenient to lead to wasing in the flask, adopts detachable design back, can take off upper portion reaction lid, washs lower part reaction vessel again.
(3) The utility model discloses well press from both sides the cover and establish on lower part reaction vessel to make its upper end and lower part reaction vessel surface seal set up, because upper portion reaction lid can follow lower part reaction vessel and demolish, and at the in-process of reaction, reaction liquid also only remains in the lower part reactor, adopt to press from both sides the cover and only establish on the lower part reactor, improve when being convenient for demolish of upper portion reaction lid and press from both sides the cover utilization ratio.
(4) The utility model discloses in set up to a mill mouth through first mill mouthful group at least, and one of them mill mouth is located flask main part middle part, second mill mouthful group sets up to a mill mouth at least, when first mill mouthful group sets up to a mill mouth, can set up it at the middle part, be convenient for install agitated vessel, when setting up to more than two, can make one of them set up in the middle of, all the other mill mouthful settings are on the next door, can connect different test equipment or inlet liquid equipment etc. through a plurality of mill mouths, be applicable to various chemical reaction demands, the flask is held to the operating personnel of also being convenient for through the second mill mouth simultaneously, prevent to roll.
(5) The utility model discloses well export and import are located the both sides that press from both sides the cover respectively and are upper and lower distribution, and cold and hot source flows in through the import that presss from both sides the cover lower part, flows from the export that presss from both sides cover upper portion, can fully play the effect to the flask main part, improves its availability factor.
(6) The utility model discloses in adopt threaded connection through upper portion reaction lid and lower part reaction vessel for the dismantlement and the installation of upper portion reaction lid are all comparatively convenient, and sealed effectual.
(7) The utility model discloses in set up to half-circular arc through lower part reaction vessel bottom for lower part reaction vessel's washing is more convenient.
Drawings
Fig. 1 is a schematic sectional view of the present invention.
Fig. 2 is a schematic top view of the present invention.
Fig. 3 is a schematic structural diagram of another embodiment of the present invention.
The reaction kettle comprises a flask main body 1, a reaction container 11 at the lower part, a reaction cover 12 at the upper part, a first ground group 2, an outlet 3, a cavity 4, an inlet 5, a second ground group 6, a jacket 7, a flange ring 13 and a sealing ring 14.
Detailed Description
The present invention will be further described with reference to the accompanying drawings. Embodiments of the present invention include, but are not limited to, the following examples.
Example 1:
referring to fig. 1-2, the multi-mouth glass reactor comprises a flask main body 1, wherein a first ground mouth group 2 is arranged at the upper part of the flask main body 1, a second ground mouth group 6 is arranged on the side surface of the flask main body 1, a jacket 7 is sleeved outside the flask main body 1, the upper end of the jacket 7 is hermetically arranged on the outer surface of the flask main body 1, a cavity 4 is arranged between the upper end of the jacket 7 and the surface of the flask main body 1, an inlet 5 and an outlet 3 are arranged on the jacket 7 and are communicated with the cavity 4, and the second ground mouth group 6 penetrates through the jacket 7 and is hermetically arranged at the joint of the two.
In the utility model, the reaction liquid can be added or the stirring device or the temperature detecting device can be connected through the first grinding mouth group 2 on the upper part of the flask main body 1, the reaction liquid or other devices can be added through the second grinding mouth group 6 on the side of the flask main body 1, the unused grinding mouth group can be sealed through the rubber plug, because the second grinding mouth group 6 is arranged on the side of the flask main body 1, namely, a certain distance is reserved between the second grinding mouth group 6 and the first grinding mouth group 2, when the reaction liquid is poured, the position of the second grinding mouth group 6 is lower, namely, the reaction liquid is only discharged through the second grinding mouth group 6, the problem that the reaction liquid partially infects on the outer wall of the flask main body 1 due to the fact that the reaction liquid flows out from a plurality of grinding mouths simultaneously, which leads to the injury to the operators is avoided, and after the first grinding mouth group 2 is arranged on the side of the flask main body 1, when the flask is turned on one side, the first grinding mouth group 2 can play the purpose of stopping rolling, the reactor is more flexible to use by introducing cold water, hot oil and the like which are used as cooling sources into the jacket 7 for circular heating or cooling reaction, the flask main body 1 needs to be heated, namely the jacket 7 can be made of glass which is the same as the flask main body 1, and the joint of the second ground mouth group 6 and the jacket 7 can be sealed by sealant.
The utility model discloses can realize preventing that reaction liquid from flowing from middle part mill's mouth to prevent that the flask from taking place rolling purpose after turning on one's side, through set up second mill's mouth group to the side of the flask main part, the outside cover of flask main part is established and is pressed from both sides the cover, has solved current glass reactor when empting reaction liquid, and the easy middle part mill's mouth of liquid flows and easily rolls after turning on one's side the problem.
Example 2:
referring to fig. 1-2, the multi-mouth glass reactor comprises a flask main body 1, wherein a first ground mouth group 2 is arranged at the upper part of the flask main body 1, a second ground mouth group 6 is arranged on the side surface of the flask main body 1, a jacket 7 is sleeved outside the flask main body 1, the upper end of the jacket 7 is hermetically arranged on the outer surface of the flask main body 1, a cavity 4 is arranged between the upper end of the jacket 7 and the surface of the flask main body 1, an inlet 5 and an outlet 3 are arranged on the jacket 7 and are communicated with the cavity 4, and the second ground mouth group 6 penetrates through the jacket 7 and is hermetically arranged at the joint of the two.
The flask main body 1 comprises an upper reaction cover 12 and a lower reaction container 11 which are arranged in a detachable sealing mode, the first ground group 2 is located in the upper reactor, and the second ground group 6 is located in the lower reaction container 11.
In this embodiment, through adopting upper portion reaction lid and lower part reaction vessel to dismantle sealed setting for the washing of flask main part is more convenient, and traditional flask adopts integrated into one piece, and grinds the mouth diameter less, leads to wasing very inconveniently in the flask, adopts detachable design after, can take off upper portion reaction lid, washs lower part reaction vessel again.
In a preferred embodiment, the jacket 7 is fitted over the lower reaction vessel 11 and has an upper end sealed with the outer surface of the lower reaction vessel 11. In the mode, the upper reaction cover can be detached from the lower reaction vessel, and in the reaction process, the reaction liquid is only remained in the lower reactor, and the jacket is only sleeved on the lower reactor, so that the detachment of the upper reaction cover is facilitated, and the utilization rate of the jacket is improved.
The other parts of this embodiment are the same as embodiment 1, and are not described herein again.
Example 3:
referring to fig. 1-3, the multi-mouth glass reactor comprises a flask main body 1, wherein a first ground mouth group 2 is arranged at the upper part of the flask main body 1, a second ground mouth group 6 is arranged on the side surface of the flask main body 1, a jacket 7 is sleeved outside the flask main body 1, the upper end of the jacket 7 is hermetically arranged on the outer surface of the flask main body 1, a cavity 4 is arranged between the upper end of the jacket 7 and the surface of the flask main body 1, an inlet 5 and an outlet 3 are arranged on the jacket 7 and are communicated with the cavity 4, and the second ground mouth group 6 penetrates through the jacket 7 and is hermetically arranged at the joint of the two.
The first ground group 2 is at least provided with one ground, one ground is positioned in the middle of the flask main body 1, and the second ground group 6 is at least provided with one ground.
In this embodiment, when the first ground group is set as one ground, it can be set in the middle to facilitate the installation of stirring equipment, when two or more ground groups are set, one ground group can be set in the middle, and the rest ground groups are set beside, and different testing equipment or liquid inlet equipment and the like can be connected through a plurality of ground groups, so that the flask is suitable for various chemical reaction requirements, and meanwhile, the flask can be conveniently held by an operator through the second ground group to prevent rolling.
Preferably, the outlet 3 and the inlet 5 are respectively located at two sides of the jacket 7 and distributed up and down. In this mode, the liquid flows in through the inlet at the lower part of the jacket and flows out through the outlet at the upper part of the jacket, thereby sufficiently acting on the flask main body and improving the use efficiency.
In a preferred embodiment, the upper reaction cover 12 is screwed to the lower reaction vessel. In the mode, the upper reaction cover is in threaded connection with the lower reaction container, so that the upper reaction cover is convenient to disassemble and assemble and good in sealing effect.
As a preferable mode, the upper reaction cover 12 and the lower reaction vessel 11 are both sleeved with flange rings 13 and fixedly connected by bolts, and the joint of the upper reaction cover 12 and the lower reaction vessel 11 is provided with a sealing ring 14, which can be a silica gel or tetrafluoro sealing gasket.
In a preferred mode, the bottom of the lower reaction vessel 11 is formed in a semicircular arc shape. In the mode, the bottom of the lower reactor is arranged to be in a semicircular arc shape, so that the lower reactor is more convenient to clean.
In a preferred manner, the lower reaction vessel 11 is provided in a cylindrical shape and chamfered at the bottom thereof.
The other parts of this embodiment are the same as embodiment 1, and are not described herein again.
The embodiment of the present invention is the above. The specific parameters in the above embodiments and examples are only for the purpose of clearly showing the verification process of the present invention, and are not used to limit the patent protection scope of the present invention, which is still subject to the claims, and all the equivalent structural changes made by using the contents of the specification and the drawings of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a many mouthfuls of glass reactors, includes flask main part (1), flask main part (1) upper portion is provided with first mill mouthful group (2), its characterized in that: the improved flask is characterized in that a second ground mouth group (6) is arranged on the side face of the flask main body (1), a jacket (7) is sleeved outside the flask main body (1), the upper end of the jacket (7) is hermetically arranged on the outer surface of the flask main body (1) and provided with a cavity (4) between the upper end of the jacket and the surface of the flask main body, an inlet (5) and an outlet (3) are arranged on the jacket (7) and communicated with the cavity (4), and the second ground mouth group (6) penetrates through the jacket (7) and is hermetically arranged at the joint of the two.
2. The multiple port glass reactor of claim 1, wherein: flask main part (1) is including adopting upper portion reaction lid (12) and lower part reaction vessel (11) that can dismantle sealed the setting, first mill mouthful group (2) are located upper portion reaction lid (12), second mill mouthful group (6) are located lower part reaction vessel (11).
3. The multiple port glass reactor of claim 2, wherein: the jacket (7) is sleeved on the lower reaction vessel (11), and the upper end of the jacket is hermetically arranged with the outer surface of the lower reaction vessel (11).
4. The multiple port glass reactor of claim 1, wherein: the first ground group (2) is at least provided with one ground, one ground is positioned in the middle of the flask main body (1), and the second ground group (6) is at least provided with one ground.
5. The multiple port glass reactor of claim 4, wherein: the outlet (3) and the inlet (5) are respectively positioned at two sides of the jacket (7) and are distributed up and down.
6. The multiple port glass reactor of claim 2, wherein: the upper reaction cover (12) is in threaded connection with the lower reaction container (11).
7. The multiple port glass reactor of claim 2, wherein: the upper reaction cover (12) and the lower reaction container (11) are both sleeved with flange rings (13) and fixedly connected through bolts, and sealing rings (14) are arranged at the joint of the upper reaction cover (12) and the lower reaction container (11).
8. The multiple port glass reactor of claim 2, wherein: the bottom of the lower reaction container (11) is arranged to be semi-circular arc.
9. The multiple port glass reactor of claim 2, wherein: the lower reaction vessel (11) is provided in a cylindrical shape and chamfered at the bottom thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920957576.5U CN210545058U (en) | 2019-06-24 | 2019-06-24 | Multi-port glass reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920957576.5U CN210545058U (en) | 2019-06-24 | 2019-06-24 | Multi-port glass reactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210545058U true CN210545058U (en) | 2020-05-19 |
Family
ID=70668169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920957576.5U Expired - Fee Related CN210545058U (en) | 2019-06-24 | 2019-06-24 | Multi-port glass reactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210545058U (en) |
-
2019
- 2019-06-24 CN CN201920957576.5U patent/CN210545058U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210545058U (en) | Multi-port glass reactor | |
| CN212140949U (en) | Traditional chinese medicine processing is with system device of enduring | |
| CN109482251B (en) | Integral type water-bath heating equipment for chemistry experiments | |
| CN208694391U (en) | A kind of machining cooling liquid filtering apparatus with refrigerating function | |
| CN202590798U (en) | Outer coiled pipe reaction kettle for synthetic resin | |
| CN206676374U (en) | A kind of jacketed reaction bottle | |
| CN205392408U (en) | Laboratory is with high -efficient glass reactor of control by temperature change type | |
| CN212092202U (en) | Reaction kettle with temperature detection device | |
| CN107824154A (en) | A kind of reactor reaction vessel apparatus for feeding | |
| CN209123925U (en) | A kind of temperature, pressure controllable high-voltage reaction kettle | |
| CN210584932U (en) | Reaction kettle | |
| CN206295938U (en) | A kind of hydrolysis reaction device of benzophenone | |
| CN207533170U (en) | A kind of high chelating agent process units of product batches quality | |
| CN213680720U (en) | Constant temperature heat preservation device is used in recombinase preparation | |
| CN214508726U (en) | Experimental animals watering device | |
| CN209237954U (en) | Noble metal clears up reaction kettle | |
| CN211837430U (en) | Liquid mixing and heating device convenient for controlling heating air pressure | |
| CN216024604U (en) | Automatic paint mixing tank for real stone paint | |
| CN215494736U (en) | Temperature control device for producing blood peptide capsules | |
| CN210905814U (en) | Join in marriage fluid reservoir convenient to sample | |
| CN105498580B (en) | A kind of quick mixing agitator of heated type biliquid | |
| CN210674990U (en) | Dull polish agitated kettle of softgel content | |
| CN215028910U (en) | Chemical industry reation kettle material temperature measuring device | |
| CN213158300U (en) | Operation is with warm sterile water regulation and control device | |
| CN215463706U (en) | Boiling pot for naphthol production |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200519 |