EP1265655A1 - Rotationspumpe mit hydraulisch gelagertem rotor - Google Patents
Rotationspumpe mit hydraulisch gelagertem rotorInfo
- Publication number
- EP1265655A1 EP1265655A1 EP01913374A EP01913374A EP1265655A1 EP 1265655 A1 EP1265655 A1 EP 1265655A1 EP 01913374 A EP01913374 A EP 01913374A EP 01913374 A EP01913374 A EP 01913374A EP 1265655 A1 EP1265655 A1 EP 1265655A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotor
- pump according
- housing
- magnetic
- conical
- 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.)
- Withdrawn
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/80—Constructional details other than related to driving
- A61M60/802—Constructional details other than related to driving of non-positive displacement blood pumps
- A61M60/818—Bearings
- A61M60/824—Hydrodynamic or fluid film bearings
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/10—Location thereof with respect to the patient's body
- A61M60/122—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body
- A61M60/165—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable in, on, or around the heart
- A61M60/178—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable in, on, or around the heart drawing blood from a ventricle and returning the blood to the arterial system via a cannula external to the ventricle, e.g. left or right ventricular assist devices
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/20—Type thereof
- A61M60/205—Non-positive displacement blood pumps
- A61M60/216—Non-positive displacement blood pumps including a rotating member acting on the blood, e.g. impeller
- A61M60/226—Non-positive displacement blood pumps including a rotating member acting on the blood, e.g. impeller the blood flow through the rotating member having mainly radial components
- A61M60/232—Centrifugal pumps
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/40—Details relating to driving
- A61M60/403—Details relating to driving for non-positive displacement blood pumps
- A61M60/405—Details relating to driving for non-positive displacement blood pumps the force acting on the blood contacting member being hydraulic or pneumatic
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/40—Details relating to driving
- A61M60/403—Details relating to driving for non-positive displacement blood pumps
- A61M60/422—Details relating to driving for non-positive displacement blood pumps the force acting on the blood contacting member being electromagnetic, e.g. using canned motor pumps
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/80—Constructional details other than related to driving
- A61M60/802—Constructional details other than related to driving of non-positive displacement blood pumps
- A61M60/804—Impellers
- A61M60/806—Vanes or blades
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/10—Location thereof with respect to the patient's body
- A61M60/122—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body
- A61M60/126—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel
- A61M60/148—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel in line with a blood vessel using resection or like techniques, e.g. permanent endovascular heart assist devices
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/40—Details relating to driving
- A61M60/403—Details relating to driving for non-positive displacement blood pumps
- A61M60/419—Details relating to driving for non-positive displacement blood pumps the force acting on the blood contacting member being permanent magnetic, e.g. from a rotating magnetic coupling between driving and driven magnets
Definitions
- the present invention relates to a rotary pump for conveying blood and other shear-sensitive liquids with a rotor hydraulically and optionally magnetically mounted in a housing.
- Rotary pumps are used to deliver blood and other shear-sensitive liquids.
- the locally occurring speed gradients must not assume excessive values, since otherwise the corpuscular parts of the blood are torn and chemical degradation processes are caused by the heating that occurs due to friction.
- low-flow zones and dead water zones must be avoided as far as possible in order to prevent the build-up of components.
- Golding (US Pat. Nos. 5,324,177 and 5,370,509) also proposed that a conical rotor with a helical wing float on a cone and that the load-bearing forces that were formed between the flat inner wall of the rotor and a cone on the rear of the housing center the rotor.
- this method only enables the formation of very small gap widths and thus high shear forces, at the same time there are long dwell times for the liquid in the gap and only comparatively small centering forces.
- Woodard et al. (WO 99/12587) proposed a pump whose rotor is mounted hydrodynamically, the rotating body consisting of several cylindrical elements, the inclined end faces of which, together with the housing surface, give tapering gaps of a short distance.
- a radial centering is achieved due to the conical shape of the top of the housing.
- This invention seems to enable a convenient generation of stabilizing forces, but disadvantageously requires small gaps of the order of less than 0.3 mm, which on the one hand causes high shear forces and can lead to massive changes in the flow conditions when small biological deposits or clots occur ,
- the rotor shapes proposed there have a number of stagnation points and stagnation zones.
- the present invention has for its object to overcome the above disadvantages.
- Mechanical bearings, dead water zones or zones reduced Flow velocities and small gap distances should be avoided.
- the number of components should be small and the structure simple.
- the invention is characterized in that the rotor has guide surfaces for generating centrifugal flow components and flow components directed against the housing, around the centrifugal flow components primarily for generating the externally effective delivery rate and the flow components directed against the housing primarily for contactless mounting and stabilization of the rotor in the housing let it work.
- the housing comprises a conical central part and / or a hollow-conical upper part, and that the rotor arranged between them is designed in the form of a conical shell.
- vanes can be arranged on the cone surface of the rotor as guide surfaces on the inside and / or outside.
- the rotor preferably has rotor openings at which the guide surfaces are arranged.
- FIGS. 1 to 5 show cross sections through different versions of the pump and Fig. 6 shows the oblique view of a rotor.
- FIG. 7 is the section through the rotor and FIG. 8 the oblique view of the section along line V - V in FIG. 7.
- FIGS. 9 and 11 show rotors in an oblique view and FIGS. 10, 12 and 13, 14 are associated sections ,
- Fig. 15 shows another example for the rotor and Fig. 16, 17 show possible cross sections of the rotor blade. All figures are kept schematically.
- Fig. 1 shows a cross section through the pump.
- the rotor 1 has guide vanes 2, 4 for generating centrifugal flow components 3 and flow components 5 directed against the housing. These guide surfaces 2, 4 are applied to a conical base body 17 which has rotor openings 18 for the flow against the inner wings 4.
- This hollow-cone-shaped rotor 1 runs in the pump housing 30 consisting of the lower housing part 19 with the conical central part 16 and a hollow-conical upper part 15, whereby the hollow-conical rotor 1 is centered on the central part 16 of the lower housing part 19 by the flow components 5 directed against the housing , this flow taking place in the preferably axial direction against the conical surface of the central part 16.
- this centering can also be carried out entirely or additionally by (5), but also centrifugal (3) flow components directed in particular against the housing against the hollow-conical upper part 15.
- a spiral-shaped outlet channel 20 incorporated in the lower housing part 19 leads to an outlet 14.
- the rotor contains rotor magnets 6 for the preferred transmission of the rotational energy, which are designed individually or as a continuous magnetic ring can. These rotor magnets are opposed by a drive which, as shown in FIG. 1, can be arranged as a stator 12 inside the lower housing part 19 and is supplied with a rotating magnetic field via coils 9.
- the coupling force 21 can act obliquely and cause an axial component for additional stabilization of the rotor 1, the direction of this axial component being able to be directed upwards or downwards by a corresponding offset of the stator 12.
- the rotor 1 has an inlet opening 36 in order to direct the incoming liquid to both sides of the rotor and against the tip of the conical central part 16.
- the drive can also take place via an electric motor 26, which drives a rotating disk 24 with magnets 10 via a shaft 25.
- This embodiment offers the advantage that no electrical energy is required for mounting the rotor, and nevertheless an axial component of the magnetic force 21 can be ensured by the axial offset of the disk 24.
- Fig. 3 shows that the drive can also be carried out via a disc rotor motor, in which the disc 11 with embedded magnets 10 or a corresponding multipole magnetization with a mounted axis 29 simultaneously as a rotor for the motor stator 44 and for the coupling of the magnetic energy serves in the rotor 1.
- the drive 7 can be provided with an externally acting stator 8, which can optionally be present instead of or in addition to the internally acting stator 12.
- magnetic stabilization can also be arranged in the vicinity of the inlet 13 in all designs of the drive, in that a ring 27 made of ferromagnetic iron or permanent magnetic material is provided in the rotor 1, on the outside and / or internally attached permanent or electromagnets 22, 28 act with coils 23 and can thus compensate for a flow-related instability of the rotor.
- the ferromagnetic ring 27 can be provided on the outside with an electrically highly conductive coating 34 in order to enable the formation of electrical eddy currents and thereby magnetic forces which contribute to the centering.
- a combination of external and internal drive systems (stators 8, 12) on the lower circumference of the rotor 1 is possible, one of which can then preferably be used for applying the rotational energy and the other for stabilization.
- the positioning (running behavior) of the rotor can be determined, for example, by corresponding position sensors, as indicated schematically in FIG. 4 by the reference symbol 42 in different positions.
- position sensors as indicated schematically in FIG. 4 by the reference symbol 42 in different positions.
- Hall sensors can be used.
- voltages induced back in the coils or the effect on high-frequency supply voltage components can also be measured and evaluated, no additional sensors being necessary.
- Fig. 5 shows the design of the pump with a rotor 1, which consists of two superimposed cone shells 31, 32, which are connected to one another by centrifugal vanes or guide surfaces 33.
- the rotor openings 18 and the outer wings 4 serve to generate flow components 5 against the upper part 15 of the housing and against the conical middle part 16 of the lower housing part 19. This achieves hydrodynamic stabilization of the rotor in the housing.
- FIG. 6 to 8 show, in an oblique view, an elevation and a section, the basic shape of a rotor 1 in an embodiment with a conical base body 17, on the outside of which vanes 2 are attached as guide surfaces for the preferred generation of centrifugal flow components.
- These vanes can have a curvature 39 in a manner known per se from centrifugal blood pumps, which, for example, enables the blades to be set up against the direction of rotation 40.
- the base body 17 has the inlet opening 36 at the inlet end, which enables the tip of the conical middle part 16 of the lower housing part 19 to be flushed directly.
- the rotor openings 18 are also incorporated into the base body, through which liquid can pass, which is directed by the vanes 4 against the middle part 16 of the housing.
- the effect of the wings 2, 4 can be reinforced by a bevel 35 of the opening 18 or even replaced if the conical base body 17 has sufficient wall thickness, in which case the wings 2, 4 could be omitted.
- the guide surfaces are thus formed only by chamfering the edges of the rotor openings 18.
- FIG. 11 to 13 a rotor with two superimposed cone shells is shown. It enables flow formation against both housing walls 16, 19. It has already been described in cross-section in FIG. 5 and is shown in detail in FIG. 11 in oblique view, in FIG. 12 in elevation and in FIG. 13 in a section transverse to the axial direction of the pump.
- the inner cone shell 31 and the outer cone shell 32 are connected to one another by webs 33, which are also effective as blades for the flow.
- the rotor openings 18 have bevels or wings (4) on the edges for generating the flow components directed against the housing.
- the pump according to FIG. 15 can also contain a rotor, in which the individual vanes 37 are designed independently without a continuous conical base body.
- These wings can be realized either with a wedge-shaped profile (see FIG. 16) or an inclined profile (see FIG. 17), with a clear beveling of the side surfaces to achieve the flow components directed against the housing.
- the guide surfaces 2 and 4 described above are thus replaced by the bevels 37 as guide surfaces.
- the rotor openings 18 extend as far as the lower edge 41 of the rotor 1. These lower edges can also be set at an angle to the running direction, so that they serve as guide surfaces for generating a buoyancy component or a delivery component for the liquid flow.
- the magnets 38 for the drive and additional magnetic mounting can be arranged at the ends of the wings.
- the outlet 14 is always arranged below the lower edge 41. If the outlet 14 is to be set higher, for example in the plane of the lower edge 41 of the rotor 1, it can be advantageous to provide two symmetrically arranged outlets or to form an outlet in two parts in order to stabilize the flow of the liquid.
Landscapes
- Health & Medical Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Cardiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Mechanical Engineering (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- External Artificial Organs (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT5102000 | 2000-03-24 | ||
AT0051000A AT412065B (de) | 2000-03-24 | 2000-03-24 | Rotationspumpe mit hydraulisch gelagertem rotor |
PCT/AT2001/000086 WO2001070300A1 (de) | 2000-03-24 | 2001-03-22 | Rotationspumpe mit hydraulisch gelagertem rotor |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1265655A1 true EP1265655A1 (de) | 2002-12-18 |
Family
ID=3675541
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01913374A Withdrawn EP1265655A1 (de) | 2000-03-24 | 2001-03-22 | Rotationspumpe mit hydraulisch gelagertem rotor |
Country Status (5)
Country | Link |
---|---|
US (1) | US20030124007A1 (de) |
EP (1) | EP1265655A1 (de) |
AT (1) | AT412065B (de) |
AU (1) | AU2001239003A1 (de) |
WO (1) | WO2001070300A1 (de) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2374989A1 (en) * | 2002-03-08 | 2003-09-08 | Andre Garon | Ventricular assist device comprising a dual inlet hybrid flow blood pump |
CA2428741A1 (en) * | 2003-05-13 | 2004-11-13 | Cardianove Inc. | Dual inlet mixed-flow blood pump |
DE10330434A1 (de) | 2003-07-04 | 2005-02-03 | Jostra Ag | Zentrifugal-Pumpe |
EP1932552B1 (de) * | 2005-09-05 | 2012-01-04 | Tokyo Institute Of Technology | Magnetische einweg-levitationsblutpumpe |
AT504990B1 (de) | 2007-02-27 | 2008-12-15 | Miracor Medizintechnik Handels | Katheter zur unterstützung der leistung eines herzens |
US8517699B2 (en) * | 2008-12-16 | 2013-08-27 | Cleveland Clinic Foundation | Centrifugal pump with offset volute |
WO2010083282A1 (en) * | 2009-01-15 | 2010-07-22 | The Charles Stark Draper Laboratory, Inc. | High-throughput biological screening |
US9227001B2 (en) | 2010-10-07 | 2016-01-05 | Everheart Systems Inc. | High efficiency blood pump |
EP2520317B1 (de) | 2011-05-05 | 2014-07-09 | Berlin Heart GmbH | Blutpumpe |
US9827357B2 (en) | 2011-12-03 | 2017-11-28 | Indiana University Research And Technology Corporation | Cavopulmonary viscous impeller assist device and method |
US8905728B2 (en) | 2011-12-30 | 2014-12-09 | Peopleflo Manufacturing, Inc. | Rotodynamic pump with permanent magnet coupling inside the impeller |
US8905729B2 (en) | 2011-12-30 | 2014-12-09 | Peopleflo Manufacturing, Inc. | Rotodynamic pump with electro-magnet coupling inside the impeller |
US10294944B2 (en) | 2013-03-08 | 2019-05-21 | Everheart Systems Inc. | Flow thru mechanical blood pump bearings |
EP3069740B1 (de) * | 2015-03-18 | 2020-12-16 | Abiomed Europe GmbH | Blutpumpe |
EP3808404A1 (de) | 2015-08-04 | 2021-04-21 | Abiomed Europe GmbH | Lager mit selbstspülung |
IL264885B (en) * | 2016-09-01 | 2022-08-01 | Abiomed Inc | Entry of an anti-suction blood pump |
AU2018301507B2 (en) | 2017-07-13 | 2024-06-13 | CORVION, Inc. | High efficiency blood pump |
FR3095018B1 (fr) | 2019-04-10 | 2022-12-02 | Fineheart | Pompe cardiaque à couplage magnétique et à flux inverse. |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2451480A1 (fr) * | 1979-03-16 | 1980-10-10 | Belenger Jacques | Pompe centrifuge medicale |
US5324177A (en) | 1989-05-08 | 1994-06-28 | The Cleveland Clinic Foundation | Sealless rotodynamic pump with radially offset rotor |
US4984972A (en) * | 1989-10-24 | 1991-01-15 | Minnesota Mining And Manufacturing Co. | Centrifugal blood pump |
AT393456B (de) * | 1989-11-15 | 1991-10-25 | Schima Heinrich | Zentrifugalpumpe zur foerderung von blut |
US5055005A (en) * | 1990-10-05 | 1991-10-08 | Kletschka Harold D | Fluid pump with levitated impeller |
US5938412A (en) * | 1995-06-01 | 1999-08-17 | Advanced Bionics, Inc. | Blood pump having rotor with internal bore for fluid flow |
US5840070A (en) * | 1996-02-20 | 1998-11-24 | Kriton Medical, Inc. | Sealless rotary blood pump |
US6074180A (en) * | 1996-05-03 | 2000-06-13 | Medquest Products, Inc. | Hybrid magnetically suspended and rotated centrifugal pumping apparatus and method |
US6015272A (en) * | 1996-06-26 | 2000-01-18 | University Of Pittsburgh | Magnetically suspended miniature fluid pump and method of designing the same |
JP2807786B2 (ja) * | 1996-07-26 | 1998-10-08 | 工業技術院長 | 人工心臓用ポンプ |
AT404318B (de) * | 1996-07-29 | 1998-10-27 | Heinrich Dr Schima | Zentrifugalpumpe bestehend aus einem pumpenkopf und einem scheibenläuferantrieb zur förderung von blut und anderen scherempfindlichen flüssigkeiten |
JP4016441B2 (ja) * | 1996-10-02 | 2007-12-05 | 株式会社ジェイ・エム・エス | ターボ式血液ポンプ |
AUPO902797A0 (en) | 1997-09-05 | 1997-10-02 | Cortronix Pty Ltd | A rotary blood pump with hydrodynamically suspended impeller |
DE29821565U1 (de) * | 1998-12-02 | 2000-06-15 | Impella Cardiotechnik AG, 52074 Aachen | Lagerlose Blutpumpe |
US6227817B1 (en) * | 1999-09-03 | 2001-05-08 | Magnetic Moments, Llc | Magnetically-suspended centrifugal blood pump |
US6439845B1 (en) * | 2000-03-23 | 2002-08-27 | Kidney Replacement Services, P.C. | Blood pump |
-
2000
- 2000-03-24 AT AT0051000A patent/AT412065B/de not_active IP Right Cessation
-
2001
- 2001-03-22 WO PCT/AT2001/000086 patent/WO2001070300A1/de not_active Application Discontinuation
- 2001-03-22 AU AU2001239003A patent/AU2001239003A1/en not_active Abandoned
- 2001-03-22 EP EP01913374A patent/EP1265655A1/de not_active Withdrawn
- 2001-03-22 US US10/239,602 patent/US20030124007A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO0170300A1 * |
Also Published As
Publication number | Publication date |
---|---|
AT412065B (de) | 2004-09-27 |
AU2001239003A1 (en) | 2001-10-03 |
WO2001070300A1 (de) | 2001-09-27 |
ATA5102000A (de) | 2004-02-15 |
US20030124007A1 (en) | 2003-07-03 |
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RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: SCHISTEK, ROLAND Inventor name: RADERER, FRANZ Inventor name: SCHIMA, HEINRICH Inventor name: SCHMALLEGGER, HELMUT |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20051001 |