CA2086675A1 - Process and device for cleaning exhaust gases - Google Patents
Process and device for cleaning exhaust gasesInfo
- Publication number
- CA2086675A1 CA2086675A1 CA002086675A CA2086675A CA2086675A1 CA 2086675 A1 CA2086675 A1 CA 2086675A1 CA 002086675 A CA002086675 A CA 002086675A CA 2086675 A CA2086675 A CA 2086675A CA 2086675 A1 CA2086675 A1 CA 2086675A1
- Authority
- CA
- Canada
- Prior art keywords
- exhaust gases
- cleaning exhaust
- channel
- ions
- cleaning
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/944—Simultaneously removing carbon monoxide, hydrocarbons or carbon making use of oxidation catalysts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/36—Controlling flow of gases or vapour
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/38—Particle charging or ionising stations, e.g. using electric discharge, radioactive radiation or flames
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/01—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust by means of electric or electrostatic separators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/818—Employing electrical discharges or the generation of a plasma
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2250/00—Combinations of different methods of purification
- F01N2250/02—Combinations of different methods of purification filtering and catalytic conversion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S55/00—Gas separation
- Y10S55/30—Exhaust treatment
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Biomedical Technology (AREA)
- Toxicology (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Exhaust Gas After Treatment (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Electrostatic Separation (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Treating Waste Gases (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
A device and process for cleaning exhaust gases, in particular those from diesel engines, in which the exhaust gases are taken through a channel (36a) of a ceramic body (36) where an electric field is generated substantially transversely to the direction of flow, whereby the soot particles deposited on the walls of the channel (36a) are oxidised by free ions or ions adhering to oxygen.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA1406/90 | 1990-07-02 | ||
AT140690 | 1990-07-02 | ||
AT0168490A AT395827B (en) | 1990-08-13 | 1990-08-13 | Process for burning aerosols, especially soot, contained in waste gases |
ATA1684/90 | 1990-08-13 | ||
PCT/AT1991/000080 WO1992000442A1 (en) | 1990-07-02 | 1991-07-01 | Process and device for cleaning exhaust gases |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2086675A1 true CA2086675A1 (en) | 1992-01-03 |
CA2086675C CA2086675C (en) | 2003-01-28 |
Family
ID=25595769
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002086675A Expired - Fee Related CA2086675C (en) | 1990-07-02 | 1991-07-01 | Process and device for cleaning exhaust gases |
Country Status (15)
Country | Link |
---|---|
US (1) | US5402639A (en) |
EP (1) | EP0537219B1 (en) |
JP (1) | JPH05507992A (en) |
KR (1) | KR0175062B1 (en) |
AT (1) | ATE102290T1 (en) |
AU (1) | AU647491B2 (en) |
BR (1) | BR9106611A (en) |
CA (1) | CA2086675C (en) |
CZ (1) | CZ396592A3 (en) |
DE (1) | DE59101116D1 (en) |
ES (1) | ES2051125T3 (en) |
HU (2) | HU216599B (en) |
RU (1) | RU2078952C1 (en) |
SK (1) | SK279653B6 (en) |
WO (1) | WO1992000442A1 (en) |
Families Citing this family (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0731256B1 (en) * | 1992-09-28 | 2000-03-22 | Ford Motor Company Limited | Filter element for exhaust emission control of internal combusion engines |
SE9203604D0 (en) * | 1992-12-01 | 1992-12-01 | Abb Flaekt Marine Ab | DEVICE FOR HETROGEN CATALYSIS |
US5409669A (en) * | 1993-01-25 | 1995-04-25 | Minnesota Mining And Manufacturing Company | Electrically regenerable diesel particulate filter cartridge and filter |
WO1995027843A1 (en) * | 1994-04-06 | 1995-10-19 | Minnesota Mining And Manufacturing Company | Electrically regenerable diesel, particulate filter cartridge and filter |
US5806305A (en) | 1994-05-18 | 1998-09-15 | Lockheed Martin Corporation | Method and apparatus for reducing pollutants |
AU6181496A (en) * | 1995-07-06 | 1997-02-05 | Carl Maria Fleck | Soot filter, in particular for diesel engine exhaust gases |
KR0148563B1 (en) * | 1995-12-28 | 1998-10-01 | 전경호 | Engine exhaust gas purifying apparatus and method thereof |
ATA24696A (en) * | 1996-02-12 | 2000-10-15 | Fleck Carl M Dr | DEVICE FOR PURIFYING EXHAUST GASES FROM INTERNAL COMBUSTION ENGINES |
US5863413A (en) | 1996-06-28 | 1999-01-26 | Litex, Inc. | Method for using hydroxyl radical to reduce pollutants in the exhaust gases from the combustion of a fuel |
US6047543A (en) | 1996-12-18 | 2000-04-11 | Litex, Inc. | Method and apparatus for enhancing the rate and efficiency of gas phase reactions |
US6029442A (en) | 1996-12-18 | 2000-02-29 | Litex, Inc. | Method and apparatus for using free radicals to reduce pollutants in the exhaust gases from the combustion of fuel |
US6321531B1 (en) | 1996-12-18 | 2001-11-27 | Litex, Inc. | Method and apparatus for using free radicals to reduce pollutants in the exhaust gases from the combustion of a fuel |
FR2798303B1 (en) * | 1999-09-14 | 2001-11-09 | Daniel Teboul | DEVICE FOR TREATING A GASEOUS MEDIUM, IN PARTICULAR EXHAUST GASES FROM AN INTERNAL COMBUSTION ENGINE, AND VEHICLE EQUIPPED WITH SUCH A DEVICE |
AT409653B (en) * | 1999-11-10 | 2002-10-25 | Fleck Carl M Dr | METHOD AND DEVICE FOR SEPARATING SOOT PARTICLES FROM AN EXHAUST GAS FLOW, IN PARTICULAR A DIESEL INTERNAL COMBUSTION ENGINE |
FR2818451B1 (en) * | 2000-12-18 | 2007-04-20 | Jean Marie Billiotte | ELECTROSTATIC ION EMISSION DEVICE FOR DEPOSITING A QUASI HOMOGENEOUS AMOUNT OF IONS ON THE SURFACE OF A MULTITUDE OF AEROSOL PARTICLES WITHIN A MOVING FLUID. |
WO2003018176A1 (en) * | 2001-08-25 | 2003-03-06 | Accentus Plc | Non-thermal plasma reactor |
US7258723B2 (en) * | 2004-09-27 | 2007-08-21 | Arvin Technologies, Inc. | Particulate filter assembly and associated method |
AT500959B1 (en) * | 2004-11-09 | 2007-05-15 | Carl M Dr Fleck | METHOD AND FILTER ARRANGEMENT FOR SEPARATING RUSSIAN PARTICLES |
JP4239992B2 (en) * | 2005-03-16 | 2009-03-18 | トヨタ自動車株式会社 | Gas purification device |
US20100018850A1 (en) * | 2008-07-28 | 2010-01-28 | Caterpillar Inc. | System for removing particulate matter from exhaust streams |
DE102008057960A1 (en) * | 2008-11-19 | 2010-05-20 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Arrangement and method for cleaning an exhaust gas stream of an internal combustion engine by the deposition of particles |
DE102009041090A1 (en) * | 2009-09-14 | 2011-03-24 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Apparatus and method for treating exhaust gas containing soot particles |
DE102009041091A1 (en) * | 2009-09-14 | 2011-03-24 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Device for the treatment of soot particles containing exhaust gas |
DE102010045506A1 (en) * | 2010-09-15 | 2012-03-15 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Device for generating an electric field in an exhaust system |
DE102011053578A1 (en) * | 2011-09-13 | 2013-03-14 | Woco Industrietechnik Gmbh | Counter electrode for use in device for separating contaminations e.g. oil droplets, from intake air supplied to combustion engine, has outer surface with material transmissive for part of contaminations separated from gas flow |
CN106076625B (en) * | 2016-08-11 | 2017-06-16 | 天津大学 | A kind of micro- electrostatic filter of cylindrical shape |
CN112627941B (en) * | 2021-01-27 | 2022-06-10 | 哈尔滨艾瑞排放控制技术股份有限公司 | Embedded utilize electrostatic adsorption to purify automobile exhaust's device |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE497081C (en) * | 1930-05-01 | Walter Baensch | Device for defogging and odorless exhaust gases from internal combustion engines | |
BE390800A (en) * | 1932-09-06 | |||
CH437919A (en) * | 1966-05-06 | 1967-06-15 | G A Messen Jaschin Fa | Device for cleaning exhaust gas using an electrostatic precipitator |
US3979193A (en) * | 1972-07-03 | 1976-09-07 | Jack Sikich | Corona discharge apparatus |
DE3035206A1 (en) * | 1979-09-20 | 1981-04-09 | Kabushiki Kaisha Toyota Chuo Kenkyusho, Nagakute, Aichi | METHOD AND DEVICE FOR REDUCING SOOT IN GASES CONTAINING SOOT |
US4276071A (en) * | 1979-12-03 | 1981-06-30 | General Motors Corporation | Ceramic filters for diesel exhaust particulates |
US4662911A (en) * | 1982-03-18 | 1987-05-05 | Nippondenso Co., Ltd. | Equipment for trapping particulates in engine exhaust gas |
DE3233461C2 (en) * | 1982-09-09 | 1984-07-05 | Daimler-Benz Ag, 7000 Stuttgart | Electrostatic device to protect catalytic converters in the exhaust duct of gasoline engines from being poisoned by pollutant particles |
DE3324886A1 (en) * | 1983-07-09 | 1985-01-17 | Robert Bosch Gmbh, 7000 Stuttgart | Apparatus for the cleaning of gases |
DE3424196A1 (en) * | 1984-02-11 | 1985-08-22 | Robert Bosch Gmbh, 7000 Stuttgart | DEVICE FOR THE REMOVAL OF SOLID PARTICULAR PARTS FROM EXHAUST GASES FROM COMBUSTION ENGINES |
DE3528445A1 (en) * | 1985-08-08 | 1987-02-19 | Bayerische Motoren Werke Ag | DEVICE AND METHOD FOR ELIMINATING RUSS OR THE LIKE. FROM THE EXHAUST GASES OF AN INTERNAL COMBUSTION ENGINE |
DE3538108A1 (en) * | 1985-10-26 | 1987-04-30 | Man Technologie Gmbh | FILTER FOR SEPARATING SOLID PARTICLES FROM DIESEL EXHAUST GASES |
DE3638203A1 (en) * | 1986-11-08 | 1988-05-19 | Kloeckner Humboldt Deutz Ag | Particulate filter, regenerable by externally applied means, for the exhaust system of a diesel internal combustion engine |
IT1196822B (en) * | 1986-12-05 | 1988-11-25 | Iveco Fiat | SELF-REGENERATING FILTER FOR THE EXHAUST GASES OF AN INTERNAL COMBUSTION ENGINE |
CH675895A5 (en) * | 1987-04-03 | 1990-11-15 | Daimler Benz Ag | |
DE3804779A1 (en) * | 1987-04-03 | 1988-10-13 | Daimler Benz Ag | Device for removing soot particles from the exhaust gas stream of a diesel internal combustion engine |
DE3723544A1 (en) * | 1987-07-16 | 1989-01-26 | Man Technologie Gmbh | ELECTROSTATIC FILTER FOR CLEANING GASES |
DE3802190A1 (en) * | 1988-01-26 | 1989-08-03 | Klaus Schumann | Filter element and process for the production of filter elements |
US4979364A (en) * | 1988-03-11 | 1990-12-25 | Fleck Carl M | Diesel fuel exhaust gas filter |
DE3834920A1 (en) * | 1988-10-13 | 1990-04-19 | Man Nutzfahrzeuge Ag | METHOD AND DEVICE FOR ELIMINATING SOOT SEPARATED IN AN EXHAUST FILTER OF AN INTERNAL COMBUSTION ENGINE |
US5074112A (en) * | 1990-02-21 | 1991-12-24 | Atomic Energy Of Canada Limited | Microwave diesel scrubber assembly |
-
1991
- 1991-07-01 EP EP91911857A patent/EP0537219B1/en not_active Expired - Lifetime
- 1991-07-01 AT AT91911857T patent/ATE102290T1/en not_active IP Right Cessation
- 1991-07-01 RU RU9192016564A patent/RU2078952C1/en active
- 1991-07-01 AU AU80066/91A patent/AU647491B2/en not_active Ceased
- 1991-07-01 ES ES91911857T patent/ES2051125T3/en not_active Expired - Lifetime
- 1991-07-01 KR KR1019920703416A patent/KR0175062B1/en not_active IP Right Cessation
- 1991-07-01 US US07/971,863 patent/US5402639A/en not_active Expired - Lifetime
- 1991-07-01 JP JP91510896A patent/JPH05507992A/en active Pending
- 1991-07-01 WO PCT/AT1991/000080 patent/WO1992000442A1/en not_active Application Discontinuation
- 1991-07-01 HU HU9204178A patent/HU216599B/en not_active IP Right Cessation
- 1991-07-01 CA CA002086675A patent/CA2086675C/en not_active Expired - Fee Related
- 1991-07-01 DE DE91911857T patent/DE59101116D1/en not_active Expired - Fee Related
- 1991-07-01 HU HU9204178A patent/HU9204178D0/en unknown
- 1991-07-01 BR BR919106611A patent/BR9106611A/en not_active IP Right Cessation
- 1991-07-01 SK SK3965-92A patent/SK279653B6/en unknown
-
1992
- 1992-12-29 CZ CS923965A patent/CZ396592A3/en unknown
Also Published As
Publication number | Publication date |
---|---|
SK396592A3 (en) | 1996-04-03 |
AU647491B2 (en) | 1994-03-24 |
EP0537219B1 (en) | 1994-03-02 |
RU2078952C1 (en) | 1997-05-10 |
KR930701682A (en) | 1993-06-12 |
US5402639A (en) | 1995-04-04 |
EP0537219A1 (en) | 1993-04-21 |
BR9106611A (en) | 1993-06-01 |
HU216599B (en) | 1999-07-28 |
ES2051125T3 (en) | 1994-06-01 |
DE59101116D1 (en) | 1994-04-07 |
KR0175062B1 (en) | 1999-03-20 |
HU9204178D0 (en) | 1993-04-28 |
SK279653B6 (en) | 1999-02-11 |
CZ396592A3 (en) | 1993-09-15 |
AU8006691A (en) | 1992-01-23 |
HUT67482A (en) | 1995-04-28 |
WO1992000442A1 (en) | 1992-01-09 |
CA2086675C (en) | 2003-01-28 |
ATE102290T1 (en) | 1994-03-15 |
JPH05507992A (en) | 1993-11-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |