CN104130716A - Polishing fluid for optical lenses and preparation method thereof - Google Patents
Polishing fluid for optical lenses and preparation method thereof Download PDFInfo
- Publication number
- CN104130716A CN104130716A CN201410308846.1A CN201410308846A CN104130716A CN 104130716 A CN104130716 A CN 104130716A CN 201410308846 A CN201410308846 A CN 201410308846A CN 104130716 A CN104130716 A CN 104130716A
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- parts
- polishing fluid
- auxiliary agent
- water
- soxylat
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- 238000005498 polishing Methods 0.000 title claims abstract description 23
- 239000012530 fluid Substances 0.000 title claims abstract description 18
- 230000003287 optical effect Effects 0.000 title claims abstract description 18
- 238000002360 preparation method Methods 0.000 title claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 15
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 claims abstract description 14
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims abstract description 12
- IMQLKJBTEOYOSI-UHFFFAOYSA-N Phytic acid Natural products OP(O)(=O)OC1C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C1OP(O)(O)=O IMQLKJBTEOYOSI-UHFFFAOYSA-N 0.000 claims abstract description 7
- GHLITDDQOMIBFS-UHFFFAOYSA-H cerium(3+);tricarbonate Chemical compound [Ce+3].[Ce+3].[O-]C([O-])=O.[O-]C([O-])=O.[O-]C([O-])=O GHLITDDQOMIBFS-UHFFFAOYSA-H 0.000 claims abstract description 7
- 239000008367 deionised water Substances 0.000 claims abstract description 7
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 7
- FFEARJCKVFRZRR-BYPYZUCNSA-N L-methionine Chemical compound CSCC[C@H](N)C(O)=O FFEARJCKVFRZRR-BYPYZUCNSA-N 0.000 claims abstract description 4
- 150000003973 alkyl amines Chemical class 0.000 claims abstract description 4
- 229930182817 methionine Natural products 0.000 claims abstract description 4
- 229910052938 sodium sulfate Inorganic materials 0.000 claims abstract description 4
- 235000011152 sodium sulphate Nutrition 0.000 claims abstract description 4
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims abstract description 4
- 229960001763 zinc sulfate Drugs 0.000 claims abstract description 4
- 229910000368 zinc sulfate Inorganic materials 0.000 claims abstract description 4
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 9
- 229910052582 BN Inorganic materials 0.000 claims description 6
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 6
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 6
- 229920000084 Gum arabic Polymers 0.000 claims description 6
- 241000978776 Senegalia senegal Species 0.000 claims description 6
- 235000010489 acacia gum Nutrition 0.000 claims description 6
- 239000000205 acacia gum Substances 0.000 claims description 6
- 239000012467 final product Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 6
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims description 6
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 6
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 6
- IDQBJILTOGBZCR-UHFFFAOYSA-N 1-butoxypropan-1-ol Chemical compound CCCCOC(O)CC IDQBJILTOGBZCR-UHFFFAOYSA-N 0.000 claims description 3
- HYZJCKYKOHLVJF-UHFFFAOYSA-N 1H-benzimidazole Chemical compound C1=CC=C2NC=NC2=C1 HYZJCKYKOHLVJF-UHFFFAOYSA-N 0.000 claims description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000007334 copolymerization reaction Methods 0.000 claims description 3
- 239000000839 emulsion Substances 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 235000010333 potassium nitrate Nutrition 0.000 claims description 3
- 239000004323 potassium nitrate Substances 0.000 claims description 3
- 235000019353 potassium silicate Nutrition 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000004140 cleaning Methods 0.000 abstract description 2
- 231100000252 nontoxic Toxicity 0.000 abstract description 2
- 230000003000 nontoxic effect Effects 0.000 abstract description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 abstract 4
- IMQLKJBTEOYOSI-GPIVLXJGSA-N Inositol-hexakisphosphate Chemical compound OP(O)(=O)O[C@H]1[C@H](OP(O)(O)=O)[C@@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@@H]1OP(O)(O)=O IMQLKJBTEOYOSI-GPIVLXJGSA-N 0.000 abstract 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 abstract 1
- WTVAYLQYAWAHAX-UHFFFAOYSA-J cerium(4+);tetrahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[Ce+4] WTVAYLQYAWAHAX-UHFFFAOYSA-J 0.000 abstract 1
- 229940068041 phytic acid Drugs 0.000 abstract 1
- -1 polyoxylethylene Polymers 0.000 abstract 1
- 230000035943 smell Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 3
- 238000000227 grinding Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- PVGBHEUCHKGFQP-UHFFFAOYSA-N sodium;n-[5-amino-2-(4-aminophenyl)sulfonylphenyl]sulfonylacetamide Chemical compound [Na+].CC(=O)NS(=O)(=O)C1=CC(N)=CC=C1S(=O)(=O)C1=CC=C(N)C=C1 PVGBHEUCHKGFQP-UHFFFAOYSA-N 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Landscapes
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Surface Treatment Of Glass (AREA)
Abstract
A disclosed polishing fluid for optical lenses is characterized by being prepared from the following raw materials in parts by weight: 10-12 parts of cerium tetrahydroxide, 5-7 parts of cerous carbonate, 1-2 parts of thiourea, 2-3 parts of inositol hexaphosphate, 4-5 parts of polyoxylethylene ether, 2-3 parts of sodium sulfate, 3-5 parts of citric acid, 3-5 parts of oxidized alkylamine polyoxethylene ether, 2-3 parts of zinc sulfate, 1-2 parts of methionine, 5-7 parts of an auxiliary agent, and 300 parts of deionized water. The polishing fluid is safe, non-toxic, free of unpleasant smells and good in performances. By adding the auxiliary agent, the polishing fluid has good wear resistance, dispersity and cleaning property, and a polished surface is smooth, clean and bright. The polishing fluid is improved in quality and stable in quality, helps to shorten the flow time of a processing technology, is safe and environment-friendly, and is suitable for polishing of optical lenses.
Description
Technical field
The present invention relates to technical field of surface, particularly a kind of polishing fluid for optical mirror slip and preparation method thereof.
Background technology
In the manufacturing industry of optical mirror slip, for preparation technology is the key of producing optical mirror slip control.Optical mirror slip is after lapping liquid fine grinding, and still there is the slight crack layer of thick about 2-3m on its surface, and the method that eliminate this slight crack layer is polishing.And wherein, for processing optical eyeglass, the polishing fluid that especially grinding optical lens uses has considerable influence to this operation.It is long that the polishing fluid that tradition is used exists the processing process time, unstable product quality, the inefficient defect of overall operation.
Summary of the invention
The object of this invention is to provide a kind of polishing fluid for optical mirror slip and preparation method thereof.
In order to realize object of the present invention, the present invention passes through following scheme implementation:
For a polishing fluid for optical mirror slip, made by the raw material of following weight part: cerous hydroxide 10-12, cerous carbonate 5-7, thiocarbamide 1-2, myo-Inositol hexaphosphate 2-3, Soxylat A 25-7 4-5, sodium sulfate 2-3, citric acid 3-5, oxidation of alkyl amine Soxylat A 25-7 3-5, zinc sulfate 2-3, methionine(Met) 1-2, auxiliary agent 5-7, deionized water 300;
Described auxiliary agent is made up of the raw material of following weight part: boron nitride 5-7, silicon carbide 4-6, water glass 1-2, saltpetre 2-3, benzoglyoxaline 1-2, propandiol butyl ether 2-3, water soluble acrylic acid polyurethane copolymerization emulsion 4-6, ethylenediamine tetraacetic acid (EDTA) 3-5, Lei meter Bang 3-4, gum arabic 2.5-3.5, water 50-53; First preparation method enters boron nitride, silicon carbide, gum arabic, Lei meter Pa'anga in the water of half amount, grind 1-2 hour, then slowly add all the other remaining components, be slowly heated to 70 DEG C-80 DEG C, stirring reaction 30-50 minute under 300-500 rev/min of condition, is cooled to room temperature and get final product.
A kind of polishing fluid for optical mirror slip of the present invention, made by following concrete steps:
(1) cerous hydroxide, cerous carbonate, thiocarbamide, Soxylat A 25-7 are mixed, add appropriate deionized water, be heated to 30 DEG C-35 DEG C, grind 25-35 minute, obtain mixing A material;
(2) all the other remaining components except auxiliary agent are joined in reactor, be uniformly mixed, be slowly heated to 35 DEG C-45 DEG C, insulation 1-1.5 hour, obtains mixing B material;
(3) the mixing B material of insulation is slowly joined while stirring and mixed in A material, after fully stirring, add auxiliary agent, continue to stir 20-30 minute, be cooled to room temperature and get final product.
Excellent effect of the present invention is: the polishing fluid safety non-toxic that the present invention produces, and without bad smell, polishing performance is good; Add auxiliary agent, have good wear-resisting, dispersion, cleaning performance, surface of polished is bright and clean bright; The present invention has not only promoted the quality of polishing fluid, and steady quality has shortened the processing process time, and safety and environmental protection, is applicable to optical mirror slip polishing.
Embodiment
Below by specific examples, the present invention is described in detail.
For a polishing fluid for optical mirror slip, by following weight part (kilogram) raw material make: cerous hydroxide 10, cerous carbonate 5, thiocarbamide 1, myo-Inositol hexaphosphate 2, Soxylat A 25-7 4, sodium sulfate 2, citric acid 3, oxidation of alkyl amine Soxylat A 25-7 3, zinc sulfate 2, methionine(Met) 1, auxiliary agent 5, deionized water 300;
Described auxiliary agent by following weight part (kilogram) raw material make: boron nitride 5, silicon carbide 4, water glass 1, saltpetre 2, benzoglyoxaline 1, propandiol butyl ether 2, water soluble acrylic acid polyurethane copolymerization emulsion 4, ethylenediamine tetraacetic acid (EDTA) 3, Lei meter Bang 3, gum arabic 2.5, water 50; First preparation method enters boron nitride, silicon carbide, gum arabic, Lei meter Pa'anga in the water of half amount, grind 1-2 hour, then slowly add all the other remaining components, be slowly heated to 70 DEG C-80 DEG C, stirring reaction 30-50 minute under 300-500 rev/min of condition, is cooled to room temperature and get final product.
A kind of polishing fluid for optical mirror slip of the present invention, made by following concrete steps:
(1) cerous hydroxide, cerous carbonate, thiocarbamide, Soxylat A 25-7 are mixed, add appropriate deionized water, be heated to 30 DEG C-35 DEG C, grind 25-35 minute, obtain mixing A material;
(2) all the other remaining components except auxiliary agent are joined in reactor, be uniformly mixed, be slowly heated to 35 DEG C-45 DEG C, insulation 1-1.5 hour, obtains mixing B material;
(3) the mixing B material of insulation is slowly joined while stirring and mixed in A material, after fully stirring, add auxiliary agent, continue to stir 20-30 minute, be cooled to room temperature and get final product.
Laboratory test results: the surface of the each eyeglass of visual inspection, lens surface outward appearance evenly, without heterochromatic; Adopt BYK company of miniature glossometer A-4430(Germany) glossiness of testing each polishing lens surface, glossiness is 49 Gu.
Claims (2)
1. the polishing fluid for optical mirror slip, it is characterized in that, made by the raw material of following weight part: cerous hydroxide 10-12, cerous carbonate 5-7, thiocarbamide 1-2, myo-Inositol hexaphosphate 2-3, Soxylat A 25-7 4-5, sodium sulfate 2-3, citric acid 3-5, oxidation of alkyl amine Soxylat A 25-7 3-5, zinc sulfate 2-3, methionine(Met) 1-2, auxiliary agent 5-7, deionized water 300;
Described auxiliary agent is made up of the raw material of following weight part: boron nitride 5-7, silicon carbide 4-6, water glass 1-2, saltpetre 2-3, benzoglyoxaline 1-2, propandiol butyl ether 2-3, water soluble acrylic acid polyurethane copolymerization emulsion 4-6, ethylenediamine tetraacetic acid (EDTA) 3-5, Lei meter Bang 3-4, gum arabic 2.5-3.5, water 50-53; First preparation method enters boron nitride, silicon carbide, gum arabic, Lei meter Pa'anga in the water of half amount, grind 1-2 hour, then slowly add all the other remaining components, be slowly heated to 70 DEG C-80 DEG C, stirring reaction 30-50 minute under 300-500 rev/min of condition, is cooled to room temperature and get final product.
2. a kind of polishing fluid for optical mirror slip according to claim 1, is characterized in that, is made up of following concrete steps:
(1) cerous hydroxide, cerous carbonate, thiocarbamide, Soxylat A 25-7 are mixed, add appropriate deionized water, be heated to 30 DEG C-35 DEG C, grind 25-35 minute, obtain mixing A material;
(2) all the other remaining components except auxiliary agent are joined in reactor, be uniformly mixed, be slowly heated to 35 DEG C-45 DEG C, insulation 1-1.5 hour, obtains mixing B material;
(3) the mixing B material of insulation is slowly joined while stirring and mixed in A material, after fully stirring, add auxiliary agent, continue to stir 20-30 minute, be cooled to room temperature and get final product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410308846.1A CN104130716B (en) | 2014-07-01 | A kind of polishing fluid for optical glass and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410308846.1A CN104130716B (en) | 2014-07-01 | A kind of polishing fluid for optical glass and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104130716A true CN104130716A (en) | 2014-11-05 |
| CN104130716B CN104130716B (en) | 2016-11-30 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104889828A (en) * | 2015-05-22 | 2015-09-09 | 丹阳丹耀光学有限公司 | Processing technology of lens made of heat-sensitive material |
| CN106366939A (en) * | 2016-08-30 | 2017-02-01 | 东兴华鸿光学科技有限公司 | Polishing solution for optics lens |
| CN106366945A (en) * | 2016-08-31 | 2017-02-01 | 常熟市光学仪器有限责任公司 | Polishing solution for processing quartz optical glass |
| CN106381068A (en) * | 2016-08-31 | 2017-02-08 | 常熟市光学仪器有限责任公司 | Polishing solution used for processing colorless optical glass |
| CN106566418A (en) * | 2016-10-28 | 2017-04-19 | 扬州翠佛堂珠宝有限公司 | Topaz polishing solution |
| CN106701020A (en) * | 2016-12-30 | 2017-05-24 | 东莞市淦宏信息科技有限公司 | Resin lens grinding fluid |
| CN108130757A (en) * | 2017-12-19 | 2018-06-08 | 江苏新瑞贝科技股份有限公司 | A kind of low temperature dyeing assistant for wool and preparation method thereof |
| CN108384671A (en) * | 2018-02-12 | 2018-08-10 | 德施普科技发展温州有限公司 | A kind of resin eyeglass cleaning solution and preparation method thereof |
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| CN1502667A (en) * | 2002-10-30 | 2004-06-09 | ������������ʽ���� | Polishing solution composition |
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| CN102352188A (en) * | 2011-09-05 | 2012-02-15 | 上海华明高纳稀土新材料有限公司 | Precision cerium-zirconium-based solid solution rare earth polishing powder and preparation method thereof |
| CN102408835A (en) * | 2011-10-20 | 2012-04-11 | 天津理工大学 | Nano-polishing solution for chemical mechanical planarization of nickel oxide thin film and application thereof |
| CN102559064A (en) * | 2011-12-15 | 2012-07-11 | 上海华明高纳稀土新材料有限公司 | Cerium-zirconium praseodymium sosoloid and preparation method thereof |
| CN103436186A (en) * | 2013-08-31 | 2013-12-11 | 青岛承天伟业机械制造有限公司 | No-toxic-substance-residue mechanical polishing agent for semiconductor materials |
| CN103468148A (en) * | 2013-08-31 | 2013-12-25 | 青岛承天伟业机械制造有限公司 | Chemical mechanical polishing solution of dielectric layer material |
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| CN1502667A (en) * | 2002-10-30 | 2004-06-09 | ������������ʽ���� | Polishing solution composition |
| CN101362925A (en) * | 2008-09-28 | 2009-02-11 | 成都贝瑞光电子材料技术有限公司 | Compound polishing powder for polishing optical elements, preparation method and polishing technology |
| CN102352188A (en) * | 2011-09-05 | 2012-02-15 | 上海华明高纳稀土新材料有限公司 | Precision cerium-zirconium-based solid solution rare earth polishing powder and preparation method thereof |
| CN102408835A (en) * | 2011-10-20 | 2012-04-11 | 天津理工大学 | Nano-polishing solution for chemical mechanical planarization of nickel oxide thin film and application thereof |
| CN102559064A (en) * | 2011-12-15 | 2012-07-11 | 上海华明高纳稀土新材料有限公司 | Cerium-zirconium praseodymium sosoloid and preparation method thereof |
| CN103436186A (en) * | 2013-08-31 | 2013-12-11 | 青岛承天伟业机械制造有限公司 | No-toxic-substance-residue mechanical polishing agent for semiconductor materials |
| CN103468148A (en) * | 2013-08-31 | 2013-12-25 | 青岛承天伟业机械制造有限公司 | Chemical mechanical polishing solution of dielectric layer material |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104889828A (en) * | 2015-05-22 | 2015-09-09 | 丹阳丹耀光学有限公司 | Processing technology of lens made of heat-sensitive material |
| CN104889828B (en) * | 2015-05-22 | 2016-03-23 | 丹阳丹耀光学有限公司 | The processing technology of heat-sensitive material eyeglass |
| CN106366939A (en) * | 2016-08-30 | 2017-02-01 | 东兴华鸿光学科技有限公司 | Polishing solution for optics lens |
| CN106366945A (en) * | 2016-08-31 | 2017-02-01 | 常熟市光学仪器有限责任公司 | Polishing solution for processing quartz optical glass |
| CN106381068A (en) * | 2016-08-31 | 2017-02-08 | 常熟市光学仪器有限责任公司 | Polishing solution used for processing colorless optical glass |
| CN106566418A (en) * | 2016-10-28 | 2017-04-19 | 扬州翠佛堂珠宝有限公司 | Topaz polishing solution |
| CN106701020A (en) * | 2016-12-30 | 2017-05-24 | 东莞市淦宏信息科技有限公司 | Resin lens grinding fluid |
| CN108130757A (en) * | 2017-12-19 | 2018-06-08 | 江苏新瑞贝科技股份有限公司 | A kind of low temperature dyeing assistant for wool and preparation method thereof |
| CN108384671A (en) * | 2018-02-12 | 2018-08-10 | 德施普科技发展温州有限公司 | A kind of resin eyeglass cleaning solution and preparation method thereof |
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Effective date of registration: 20161008 Address after: 362417 Quanzhou province Anxi County Peach boat Township, South pit street, No. 8 Applicant after: Zhang Lianjiang Address before: 233000 No. 404 South Daqing Road, hi tech Zone, Anhui, Bengbu Applicant before: Anhui Topusen Battery Co., Ltd. |
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Effective date of registration: 20170320 Address after: 528437 Zhongshan Torch Development Zone, Guangdong Road, No. 13 Patentee after: North Zhongshan Jinghua Precision Optical Co. Ltd. Address before: 362417 Quanzhou province Anxi County Peach boat Township, South pit street, No. 8 Patentee before: Zhang Lianjiang |
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Inventor after: Qin Chaofeng Inventor after: Yang Shugang Inventor after: Yuan Zhifeng Inventor before: Qin Chaofeng |
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| CB03 | Change of inventor or designer information |