DE3830318A1 - Abgaskatalysator mit verminderter neigung zu speicherung von schwefeloxiden und schwefelwasserstoffemission - Google Patents

Abgaskatalysator mit verminderter neigung zu speicherung von schwefeloxiden und schwefelwasserstoffemission

Info

Publication number
DE3830318A1
DE3830318A1 DE3830318A DE3830318A DE3830318A1 DE 3830318 A1 DE3830318 A1 DE 3830318A1 DE 3830318 A DE3830318 A DE 3830318A DE 3830318 A DE3830318 A DE 3830318A DE 3830318 A1 DE3830318 A1 DE 3830318A1
Authority
DE
Germany
Prior art keywords
catalyst
weight
optionally
support
noble metal
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
Application number
DE3830318A
Other languages
German (de)
English (en)
Other versions
DE3830318C2 (enExample
Inventor
Bernd Dr Engler
Edgar Dr Koberstein
Egbert Dr Lox
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Evonik Operations GmbH
Original Assignee
Degussa GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Degussa GmbH filed Critical Degussa GmbH
Priority to DE3830318A priority Critical patent/DE3830318A1/de
Priority to US07/345,721 priority patent/US4963521A/en
Priority to ZA895626A priority patent/ZA895626B/xx
Priority to ES198989116177T priority patent/ES2014396T3/es
Priority to DE8989116177T priority patent/DE58903941D1/de
Priority to EP89116177A priority patent/EP0358125B1/de
Priority to BR898904438A priority patent/BR8904438A/pt
Priority to MX017445A priority patent/MX171738B/es
Priority to JP01229484A priority patent/JP3130904B2/ja
Priority to KR1019890012848A priority patent/KR900004400A/ko
Priority to CA000610479A priority patent/CA1335278C/en
Priority to FI894227A priority patent/FI96746C/fi
Publication of DE3830318A1 publication Critical patent/DE3830318A1/de
Application granted granted Critical
Publication of DE3830318C2 publication Critical patent/DE3830318C2/de
Granted legal-status Critical Current

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
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9445—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC]
    • B01D53/945—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC] characterised by a specific catalyst
    • 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
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8603—Removing sulfur compounds
    • B01D53/8612—Hydrogen sulfide
    • B01D53/8615—Mixtures of hydrogen sulfide and sulfur oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/56—Platinum group metals
    • B01J23/63—Platinum group metals with rare earths or actinides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/89—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals
    • B01J23/8933—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals also combined with metals, or metal oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/894—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals also combined with metals, or metal oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with rare earths or actinides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
    • B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional [3D] monoliths
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/0009—Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/02—Impregnation, coating or precipitation
    • B01J37/024—Multiple impregnation or coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/08—Heat treatment
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Catalysts (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
DE3830318A 1988-09-07 1988-09-07 Abgaskatalysator mit verminderter neigung zu speicherung von schwefeloxiden und schwefelwasserstoffemission Granted DE3830318A1 (de)

Priority Applications (12)

Application Number Priority Date Filing Date Title
DE3830318A DE3830318A1 (de) 1988-09-07 1988-09-07 Abgaskatalysator mit verminderter neigung zu speicherung von schwefeloxiden und schwefelwasserstoffemission
US07/345,721 US4963521A (en) 1988-09-07 1989-05-01 Exhaust-gas catalyst with reduced tendency to store sulfur oxides and to emit hydrogen sulfide and process for preparing the catalyst
ZA895626A ZA895626B (en) 1988-09-07 1989-07-24 Exhaust gas catalyst having reduced tendency to store sulphur oxides and hydrogen sulphide emission
DE8989116177T DE58903941D1 (de) 1988-09-07 1989-09-01 Abgaskatalysator mit verminderter neigung zur speicherung von schwefeloxiden und schwefelwasserstoffemission.
EP89116177A EP0358125B1 (de) 1988-09-07 1989-09-01 Abgaskatalysator mit verminderter Neigung zur Speicherung von Schwefeloxiden und Schwefelwasserstoffemission
ES198989116177T ES2014396T3 (es) 1988-09-07 1989-09-01 Catalizador para gases de escape con tendencia reducida al almacenamiento de oxidos de azufre y a la emision de sulfuro de hidrogeno.
BR898904438A BR8904438A (pt) 1988-09-07 1989-09-04 Catalisador para gases de escapamento,tendo uma tendencia reduzida para acumular oxidos de nexofre e para emitir acido sulfidrico
MX017445A MX171738B (es) 1988-09-07 1989-09-06 Catalizador de gas de escape con tendencia reducida a la acumulacion de la emision de sulfuro de hidrogeno y oxidos de azufre
JP01229484A JP3130904B2 (ja) 1988-09-07 1989-09-06 内燃機関の排出ガス浄化用触媒、触媒の製造方法および排出ガス浄化方法
KR1019890012848A KR900004400A (ko) 1988-09-07 1989-09-06 산화황의 축적 및 황화수소 방출을 감소시키는 배기가스 촉매
CA000610479A CA1335278C (en) 1988-09-07 1989-09-06 Exhaust gas catalyst with a reduced tendency to accumulate sulfur dioxide and hydrogen sulfide emissions
FI894227A FI96746C (fi) 1988-09-07 1989-09-07 Pakokaasukatalysaattori, jolla on vähentynyt taipumus rikkioksidien varastointiin ja rikkivetypäästöön

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3830318A DE3830318A1 (de) 1988-09-07 1988-09-07 Abgaskatalysator mit verminderter neigung zu speicherung von schwefeloxiden und schwefelwasserstoffemission

Publications (2)

Publication Number Publication Date
DE3830318A1 true DE3830318A1 (de) 1990-03-15
DE3830318C2 DE3830318C2 (enExample) 1990-08-30

Family

ID=6362406

Family Applications (2)

Application Number Title Priority Date Filing Date
DE3830318A Granted DE3830318A1 (de) 1988-09-07 1988-09-07 Abgaskatalysator mit verminderter neigung zu speicherung von schwefeloxiden und schwefelwasserstoffemission
DE8989116177T Expired - Fee Related DE58903941D1 (de) 1988-09-07 1989-09-01 Abgaskatalysator mit verminderter neigung zur speicherung von schwefeloxiden und schwefelwasserstoffemission.

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE8989116177T Expired - Fee Related DE58903941D1 (de) 1988-09-07 1989-09-01 Abgaskatalysator mit verminderter neigung zur speicherung von schwefeloxiden und schwefelwasserstoffemission.

Country Status (11)

Country Link
US (1) US4963521A (enExample)
EP (1) EP0358125B1 (enExample)
JP (1) JP3130904B2 (enExample)
KR (1) KR900004400A (enExample)
BR (1) BR8904438A (enExample)
CA (1) CA1335278C (enExample)
DE (2) DE3830318A1 (enExample)
ES (1) ES2014396T3 (enExample)
FI (1) FI96746C (enExample)
MX (1) MX171738B (enExample)
ZA (1) ZA895626B (enExample)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5354720A (en) * 1992-03-04 1994-10-11 Degussa Aktiengesellschaft Reduction in the quantity of NOx in lean exhaust gas of motor vehicle engines
US5496788A (en) * 1992-02-14 1996-03-05 Degussa Aktiengesellschaft Coating dispersion for exhaust gas catalysts
US5958829A (en) * 1992-02-14 1999-09-28 Degussa-Huls Aktiengesellschaft Coating dispersion for exhaust gas catalysts
US8076263B2 (en) 2006-10-06 2011-12-13 W. R. Grace & Co.-Conn. Sulfur tolerant alumina catalyst support
US8158257B2 (en) 2006-10-06 2012-04-17 W. R. Grace & Co.-Conn. Sulfur tolerant alumina catalyst support

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3830319C1 (enExample) * 1988-09-07 1989-07-20 Degussa Ag, 6000 Frankfurt, De
JP2786933B2 (ja) * 1990-09-03 1998-08-13 株式会社日本触媒 排ガス浄化用触媒
US5116800A (en) * 1990-12-11 1992-05-26 Allied-Signal Inc. High durability and exhuast catalyst with low hydrogen sulfide emissions
DE4204421C2 (de) * 1992-02-14 1996-03-21 Degussa Katalysator für die Reinigung der Abgase von Brennkraftmaschinen
JP2698302B2 (ja) * 1992-11-24 1998-01-19 株式会社日本触媒 排気ガス浄化用触媒
EP0613714B1 (en) * 1993-01-11 2001-07-04 Toyota Jidosha Kabushiki Kaisha Process for purifying exhaust gases
CN1052170C (zh) * 1994-09-24 2000-05-10 华夏海南开发建设经营公司 内燃机排气的净化催化剂
ATE179907T1 (de) * 1994-11-02 1999-05-15 Anglo American Res Lab Pty Ltd Katalysator mit zirkonoxid/ceroxid träger
US20040086441A1 (en) 1995-12-06 2004-05-06 Masao Hori Process for purifying exhaust gas from gasoline engines
JP2000515058A (ja) * 1996-05-28 2000-11-14 アングロ・アメリカン・リサーチ・ラボラトリーズ・（プロプライエタリー）・リミテッド 酸化触媒
US5690900A (en) * 1996-10-10 1997-11-25 Smojver; Radmil Ammonia oxidation catalyst
GB9806199D0 (en) * 1998-03-24 1998-05-20 Johnson Matthey Plc Catalytic generation of hydrogen
DE19908394A1 (de) * 1999-02-26 2000-08-31 Degussa Katalysatormaterial und Verfahren zu seiner Herstellung
JP3743995B2 (ja) * 1999-12-15 2006-02-08 日産自動車株式会社 メタノール改質触媒
KR100891794B1 (ko) * 2002-12-23 2009-04-07 주식회사 포스코 탈황용 안정화 마그헤마이트 촉매의 제조방법
JPWO2005034097A1 (ja) 2003-09-30 2006-12-14 富士通株式会社 垂直磁気記録媒体、その製造方法、および磁気記憶装置
ES2582952T3 (es) 2008-12-23 2016-09-16 Clariant Prodotti (Italia) Spa Catalizadores de oxidación de amoníaco
JP5932650B2 (ja) 2009-10-08 2016-06-08 ダブリュー・アール・グレイス・アンド・カンパニー−コネチカット 硫黄耐性アルミナ触媒担体
WO2017053393A1 (en) 2015-09-22 2017-03-30 Basf Corporation Sulfur-tolerant catalytic system
CN112642428B (zh) * 2019-10-12 2023-05-02 中国石油化工股份有限公司 催化剂及其制备方法和应用以及废气的处理方法
US11788450B2 (en) * 2020-10-30 2023-10-17 Johnson Matthey Public Limited Company TWC catalysts for gasoline engine exhaust gas treatments
JP2023547301A (ja) 2020-10-30 2023-11-10 ジョンソン、マッセイ、パブリック、リミテッド、カンパニー ガソリンエンジン排気ガス処理のための新規トリメタル白金族金属（ｐｇｍ、ｐｌａｔｉｎｕｍ ｇｒｏｕｐ ｍｅｔａｌ）触媒
CN117942971B (zh) * 2023-12-18 2024-08-09 北京科技大学 富含金属缺陷氧化铈纳米棒的硫化氢氧化催化剂的制备方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2907106C2 (de) * 1979-02-23 1985-12-19 Degussa Ag, 6000 Frankfurt Abgaskatalysator und seine Verwendung zur Reinigung der Abgase von Verbrennungskraftmaschinen

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51104488A (en) * 1975-03-13 1976-09-16 Toyota Motor Co Ltd Shokubaitantai oyobi shokubai
JPS5227086A (en) * 1975-08-28 1977-03-01 Nissan Motor Co Ltd Catalyst for purification of exhaust gas
US4233183A (en) * 1979-02-06 1980-11-11 Hitachi Shipbuilding & Engineering Co., Ltd. Process for producing plate-shaped denitrating catalyst
JPS609861B2 (ja) * 1979-12-19 1985-03-13 株式会社豊田中央研究所 排気ガス浄化用触媒
FR2546078B1 (fr) * 1983-05-19 1987-05-07 Pro Catalyse Procede de fabrication de catalyseurs pour le traitement des gaz d'echappement des moteurs a combustion interne
FR2568143B1 (fr) * 1984-07-30 1986-12-05 Prod Catalyse Ste Fse Catalyseur et procede pour le traitement des gaz d'echappement des moteurs a combustion interne

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2907106C2 (de) * 1979-02-23 1985-12-19 Degussa Ag, 6000 Frankfurt Abgaskatalysator und seine Verwendung zur Reinigung der Abgase von Verbrennungskraftmaschinen

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5496788A (en) * 1992-02-14 1996-03-05 Degussa Aktiengesellschaft Coating dispersion for exhaust gas catalysts
US5958829A (en) * 1992-02-14 1999-09-28 Degussa-Huls Aktiengesellschaft Coating dispersion for exhaust gas catalysts
US5354720A (en) * 1992-03-04 1994-10-11 Degussa Aktiengesellschaft Reduction in the quantity of NOx in lean exhaust gas of motor vehicle engines
US8076263B2 (en) 2006-10-06 2011-12-13 W. R. Grace & Co.-Conn. Sulfur tolerant alumina catalyst support
US8158257B2 (en) 2006-10-06 2012-04-17 W. R. Grace & Co.-Conn. Sulfur tolerant alumina catalyst support

Also Published As

Publication number Publication date
JP3130904B2 (ja) 2001-01-31
EP0358125A2 (de) 1990-03-14
ES2014396T3 (es) 1993-11-01
KR900004400A (ko) 1990-04-12
EP0358125B1 (de) 1993-03-31
FI96746C (fi) 1996-08-26
DE3830318C2 (enExample) 1990-08-30
BR8904438A (pt) 1990-10-02
ZA895626B (en) 1990-05-30
DE58903941D1 (de) 1993-05-06
FI894227L (fi) 1990-03-08
EP0358125A3 (en) 1990-08-01
US4963521A (en) 1990-10-16
FI894227A0 (fi) 1989-09-07
FI96746B (fi) 1996-05-15
JPH02111442A (ja) 1990-04-24
ES2014396A4 (es) 1990-07-16
CA1335278C (en) 1995-04-18
MX171738B (es) 1993-11-11

Similar Documents

Publication Publication Date Title
EP0358125B1 (de) Abgaskatalysator mit verminderter Neigung zur Speicherung von Schwefeloxiden und Schwefelwasserstoffemission
DE3830319C1 (enExample)
EP0314057B1 (de) Rhodium-freier Dreiwegkatalysator
EP0314058B1 (de) Platin-freier Dreiweg-Katalysator.
DE3803122C1 (enExample)
DE69518994T2 (de) Verfahren zur Reinigung von Abgasen
DE69706176T2 (de) Dreiweg-umwandlungskatalysatoren und verfahren zu ihrer herstellung
DE69806064T2 (de) Dauerhaft thermisch stabiler dreiwegkatalysator mit geringer h2s-bildungsrate
EP0441173B1 (de) Katalysator für die Reinigung der Abgase von Brennkraftmaschinen
DE60121554T2 (de) Mehrzonen-speicherkatalysator und verfahren zu dessen herstellung und dessen verwendung
DE69729715T2 (de) Katalysator und Verfahren zur Reinigung von Abgasen
DE69417889T2 (de) Zusammengesetzten schichtkatalysator
DE69924815T2 (de) Abgasreinigungskatalysator
DE69519115T2 (de) Katalysator und Verfahren zur Reinigung von Abgasen
DE19813655C2 (de) Speichermaterial für Schwefeloxide, Verfahren zu dessen Herstellung und Verwendung
EP1974809B1 (de) Doppelschichtiger Dreiweg-Katalysator
EP0993860B1 (de) Verwendung eines Stickoxid-Speicherkatalysators auf der Basis von Barium- und/oder Strontiumsulfat
DE69616225T2 (de) Stickstoffoxid-Abscheider
DE69316058T2 (de) Verfahren zur Reinigung von Abgasen
DE19838282A1 (de) Stickoxid-Speichermaterial und daraus hergestellter Stickoxid-Speicherkatalysator
DE19742705A1 (de) Abgasreinigungskatalysator
DE3902913C2 (enExample)
DE69431980T2 (de) Verfahren zur Herstellung eines Abgasreinigungskatalysator
DE3830317A1 (de) Katalysator fuer die beseitigung von in abgasen ueberwiegend mit alkohol betriebener verbrennungskraftmaschinen enthaltenen schadstoffen, verfahren zur herstellung und verwendung
DE60120206T2 (de) Absorptions-/reduktionskatalysator zur nox-entfernung

Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee