DE3364691D1 - Improved zeolite l - Google Patents
Improved zeolite lInfo
- Publication number
- DE3364691D1 DE3364691D1 DE8383302732T DE3364691T DE3364691D1 DE 3364691 D1 DE3364691 D1 DE 3364691D1 DE 8383302732 T DE8383302732 T DE 8383302732T DE 3364691 T DE3364691 T DE 3364691T DE 3364691 D1 DE3364691 D1 DE 3364691D1
- Authority
- DE
- Germany
- Prior art keywords
- improved zeolite
- zeolite
- improved
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C5/00—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms
- C07C5/32—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by dehydrogenation with formation of free hydrogen
- C07C5/373—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by dehydrogenation with formation of free hydrogen with simultaneous isomerisation
- C07C5/393—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by dehydrogenation with formation of free hydrogen with simultaneous isomerisation with cyclisation to an aromatic six-membered ring, e.g. dehydrogenation of n-hexane to benzene
- C07C5/41—Catalytic processes
- C07C5/415—Catalytic processes with metals
-
- 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
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/60—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the type L, as exemplified by patent document US3216789
-
- 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
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/60—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the type L, as exemplified by patent document US3216789
- B01J29/61—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the type L, as exemplified by patent document US3216789 containing iron group metals, noble metals or copper
- B01J29/62—Noble metals
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B39/00—Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
- C01B39/02—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
- C01B39/32—Type L
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C5/00—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms
- C07C5/22—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by isomerisation
- C07C5/2206—Catalytic processes not covered by C07C5/23 - C07C5/31
- C07C5/226—Catalytic processes not covered by C07C5/23 - C07C5/31 with metals
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G35/00—Reforming naphtha
- C10G35/04—Catalytic reforming
- C10G35/06—Catalytic reforming characterised by the catalyst used
- C10G35/095—Catalytic reforming characterised by the catalyst used containing crystalline alumino-silicates, e.g. molecular sieves
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2529/00—Catalysts comprising molecular sieves
- C07C2529/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites, pillared clays
- C07C2529/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- C07C2529/064—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof containing iron group metals, noble metals or copper
- C07C2529/068—Noble metals
-
- 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
- Y10S423/00—Chemistry of inorganic compounds
- Y10S423/28—LTL, e.g. BA-G, L, AG-1, AG-2, AG-4, BA-6
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
- Catalysts (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8214147 | 1982-05-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3364691D1 true DE3364691D1 (de) | 1986-08-28 |
Family
ID=10530369
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8383302732T Expired DE3364691D1 (de) | 1982-05-14 | 1983-05-13 | Improved zeolite l |
Country Status (10)
Country | Link |
---|---|
US (3) | US4544539A (de) |
EP (2) | EP0096479B1 (de) |
JP (2) | JPS58223614A (de) |
AU (1) | AU558817B2 (de) |
BR (1) | BR8302514A (de) |
CA (1) | CA1204719A (de) |
DE (1) | DE3364691D1 (de) |
ES (2) | ES522358A0 (de) |
GB (1) | GB2121778A (de) |
NO (1) | NO163613C (de) |
Families Citing this family (66)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4544539A (en) * | 1982-05-14 | 1985-10-01 | Exxon Research & Engineering Co. | Zeolite L with cylindrical morphology |
US4593133A (en) * | 1982-05-14 | 1986-06-03 | Exxon Research & Engineering Co. | Zeolite L |
US4595670A (en) * | 1983-11-10 | 1986-06-17 | Exxon Research And Engineering Co. | Zeolite catalyst |
CA1231699A (en) † | 1983-11-10 | 1988-01-19 | Samuel J. Tauster | Zeolite catalyst and process for using said catalyst |
US4595668A (en) * | 1983-11-10 | 1986-06-17 | Exxon Research And Engineering Co. | Bound zeolite catalyst |
US4925819A (en) * | 1983-11-10 | 1990-05-15 | Exxon Research & Engineering Company | Method of regenerating a deactivated catalyst |
US4657749A (en) * | 1983-11-10 | 1987-04-14 | Exxon Research And Engineering Company | Stoichiometric process for preparing a zeolite of the L type |
GB8329950D0 (en) * | 1983-11-10 | 1983-12-14 | Exxon Research Engineering Co | Zeolite l preparation |
GB8329972D0 (en) * | 1983-11-10 | 1983-12-14 | Exxon Research Engineering Co | Zeolite l preparation from alumina rich gels |
US4973461A (en) * | 1983-11-10 | 1990-11-27 | Exxon Research & Engineering Company | Crystalline zeolite composition |
GB8329973D0 (en) * | 1983-11-10 | 1983-12-14 | Exxon Research Engineering Co | Recycled zeolite l preparation |
US4552856A (en) * | 1983-11-10 | 1985-11-12 | Exxon Research And Engineering Co. | Zeolite catalyst and preparation thereof |
US4595669A (en) * | 1983-11-10 | 1986-06-17 | Exxon Research And Engineering Co. | Method of preparing an improved catalyst |
US4888167A (en) * | 1984-04-13 | 1989-12-19 | Uop | Germanium-aluminum-phosphorus-oxide molecular sieve compositions |
CA1248931A (en) * | 1984-12-17 | 1989-01-17 | Wicher T. Koetsier | Zeolite l preparation |
US4840779A (en) * | 1985-07-08 | 1989-06-20 | Uop | Crystalline zeolite LZ-202 and process for preparing same |
GB8525404D0 (en) * | 1985-10-15 | 1985-11-20 | Exxon Chemical Patents Inc | Zeolite l |
US5242675A (en) * | 1985-10-15 | 1993-09-07 | Exxon Research & Engineering Company | Zeolite L |
US4717700A (en) * | 1986-06-16 | 1988-01-05 | Exxon Research & Engineering Co. | Catalyst drying and activation methods |
FR2602760B1 (fr) * | 1986-08-13 | 1988-11-04 | Inst Francais Du Petrole | Nouvelle zeolithe l decationisee, desaluminee et stabilisee |
EP0258127B1 (de) * | 1986-08-13 | 1990-03-21 | Institut Français du Pétrole | Entkationisiertes, entaluminisiertes und stabilisiertes Zeolith-L und seine Anwendungen |
JPH0829255B2 (ja) * | 1986-10-04 | 1996-03-27 | 出光興産株式会社 | 芳香族炭化水素製造用触媒およびこれを用いた芳香族炭化水素の製造方法 |
US5486498A (en) * | 1986-10-14 | 1996-01-23 | Exxon Research & Engineering Company | Zeolite L |
US4995963A (en) * | 1986-12-22 | 1991-02-26 | Union Oil Company Of California | Crystalline galliosilicate with the zeolite L type structure and its use in chemical catalytic conversions |
US5035868A (en) * | 1986-12-22 | 1991-07-30 | Union Oil Company Of California | Catalyst composition containing a crystalline galliosilicate having the zeolite L type structure |
US4919907A (en) * | 1986-12-22 | 1990-04-24 | Union Oil Company Of California | Crystalline galliosilicate with the zeolite L type structure |
EP0280513B1 (de) * | 1987-02-25 | 1992-04-01 | Exxon Chemical Patents Inc. | Herstellung von Zeolith-L |
GB8704365D0 (en) * | 1987-02-25 | 1987-04-01 | Exxon Chemical Patents Inc | Zeolite l preparation |
GB8709506D0 (en) * | 1987-04-22 | 1987-05-28 | Exxon Chemical Patents Inc | Zeolite l synthesis |
GB8800045D0 (en) * | 1988-01-04 | 1988-02-10 | Exxon Chemical Patents Inc | Zeolite l |
GB8800046D0 (en) * | 1988-01-04 | 1988-02-10 | Exxon Chemical Patents Inc | Zeolite l |
US5146040A (en) * | 1988-01-04 | 1992-09-08 | Exxon Chemical Patents Inc. | Process for separating dimethylnaphthalene isomers with zeolite L agglomerates |
GB8801067D0 (en) * | 1988-01-19 | 1988-02-17 | Exxon Chemical Patents Inc | Zeolite l preparation |
US4888105A (en) * | 1988-02-16 | 1989-12-19 | Mobil Oil Corporation | Process for the dehydrocyclization of acyclic hydrocarbons and catalyst composition therefor |
GB8819260D0 (en) * | 1988-08-12 | 1988-09-14 | Exxon Chemical Patents Inc | Zeolite l preparation |
US4987109A (en) * | 1988-10-19 | 1991-01-22 | Exxon Chemical Patents Inc. | Zeolites for reforming catalysts |
US5152884A (en) * | 1988-10-19 | 1992-10-06 | Exxon Chemicals Patents Inc. | Zeolites for reforming catalysts |
US5670130A (en) * | 1989-08-09 | 1997-09-23 | Exxon Chemical Patents Inc. (Ecpi) | Zeolite L preparation |
KR0163406B1 (ko) * | 1989-09-29 | 1998-11-16 | 앤 제이콥슨 | 제올라이트 응집체 및 촉매 |
US6740228B1 (en) * | 1989-10-30 | 2004-05-25 | Exxonmobil Chemical Patents Inc. | Process for reforming petroleum hydrocarbon stocks |
US5491119A (en) * | 1989-10-30 | 1996-02-13 | Exxon Chemical Patents Inc. | Zeolite L |
GB8924410D0 (en) * | 1989-10-30 | 1989-12-20 | Exxon Chemical Patents Inc | Zeolite l |
US5294579A (en) * | 1991-02-05 | 1994-03-15 | Idemitsu Kosan Co., Ltd. | L-type zeolite and catalyst for the production of aromatic hydrocarbons |
US5354933A (en) * | 1991-02-05 | 1994-10-11 | Idemitsu Kosan Co., Ltd. | Process for producing aromatic hydrocarbons |
GB9102703D0 (en) * | 1991-02-08 | 1991-03-27 | Exxon Chemical Patents Inc | Fe-containing zeolite kl |
JP2606991B2 (ja) * | 1991-10-03 | 1997-05-07 | 出光興産株式会社 | 失活触媒の再生方法 |
US5318766A (en) * | 1992-09-25 | 1994-06-07 | Exxon Research And Engineering Company | Process for preparing LTL nano-crystalline zeolite compositions |
US5330736A (en) * | 1992-12-07 | 1994-07-19 | W. R. Grace & Co.-Conn. | Zeolite L synthesis and resulting product |
US5387844A (en) * | 1993-06-15 | 1995-02-07 | Micron Display Technology, Inc. | Flat panel display drive circuit with switched drive current |
US5624657A (en) * | 1994-11-01 | 1997-04-29 | Exxon Research And Engineering Company | Crystalline zeolite composition ECR-31 and process for its preparation |
WO1997003021A1 (en) * | 1995-07-10 | 1997-01-30 | Exxon Chemical Patents Inc. | Zeolites and processes for their manufacture |
US5785945A (en) * | 1996-07-31 | 1998-07-28 | Chevron Chemical Company Llc | Preparation of zeolite L |
AU5920198A (en) | 1997-01-16 | 1998-08-07 | Exxon Chemical Patents Inc. | Method for depositing catalyst metals into zeolite to produce hydrocarbon processing catalyst |
US6797155B1 (en) | 1999-12-21 | 2004-09-28 | Exxonmobil Research & Engineering Co. | Catalytic cracking process using a modified mesoporous aluminophosphate material |
US6392109B1 (en) | 2000-02-29 | 2002-05-21 | Chevron U.S.A. Inc. | Synthesis of alkybenzenes and synlubes from Fischer-Tropsch products |
US6566569B1 (en) | 2000-06-23 | 2003-05-20 | Chevron U.S.A. Inc. | Conversion of refinery C5 paraffins into C4 and C6 paraffins |
US6441263B1 (en) | 2000-07-07 | 2002-08-27 | Chevrontexaco Corporation | Ethylene manufacture by use of molecular redistribution on feedstock C3-5 components |
US8330122B2 (en) | 2007-11-30 | 2012-12-11 | Honeywell International Inc | Authenticatable mark, systems for preparing and authenticating the mark |
US8263518B2 (en) * | 2007-12-13 | 2012-09-11 | Chevron Phillips Chemical Company Lp | Catalyst having an improved crush strength and methods of making and using same |
DE102010034005A1 (de) * | 2010-08-11 | 2012-02-16 | Süd-Chemie AG | Hydrothermale Synthese von Zeolithen oder zeolithähnlichen Materialien unter Verwendung von modifizierten Mischoxiden |
CN104936693A (zh) | 2013-01-23 | 2015-09-23 | 巴斯夫公司 | 通过改进的沸石和磷相互作用来增强zsm-5添加剂活性 |
US9573122B2 (en) | 2014-08-29 | 2017-02-21 | Chevron U.S.A. Inc. | Small crystal LTL framework type zeolites |
FR3090616A1 (fr) | 2018-12-21 | 2020-06-26 | IFP Energies Nouvelles | Procédé de préparation d'une zéolithe de type structural LTL |
US11529617B2 (en) | 2020-08-12 | 2022-12-20 | Chevron Phillips Chemical Company, Lp | Catalyst supports and catalyst systems and methods |
CN113830784A (zh) * | 2021-09-03 | 2021-12-24 | 化学与精细化工广东省实验室 | 一种动态合成纳米kl分子筛的方法及应用 |
US20230407189A1 (en) | 2022-06-17 | 2023-12-21 | Chevron Phillips Chemical Company Lp | Use of high halide-containing catalyst in front reactors to extend the life and selectivity of reforming catalyst |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD88789A (de) * | ||||
US3298780A (en) * | 1961-03-21 | 1967-01-17 | Union Oil Co | Process for preparing a crystalline zeolite |
NL238183A (de) * | 1962-08-03 | |||
FR1598506A (de) * | 1968-01-05 | 1970-07-06 | ||
US3867512A (en) * | 1969-09-10 | 1975-02-18 | Union Oil Co | Method of preparing crystalline {37 l{38 {0 zeolite |
BE789095A (fr) * | 1971-09-23 | 1973-03-21 | Ici Ltd | Procede de preparation de zeolites |
BE792608A (nl) * | 1972-01-07 | 1973-06-12 | Shell Int Research | Werkwijze voor het bereiden van op zeoliet l gebaseerde katalysatoren voor het omzetten van koolwaterstoffen |
SU548567A1 (ru) * | 1975-07-28 | 1977-02-28 | Институт Физической И Органической Химии Им.П.Г.Меликашвили Ан Грузинской Сср | Способ получени синтетического цеолита типа "л" |
FR2323664A1 (fr) * | 1975-09-10 | 1977-04-08 | Erap | Procede de deshydrocyclisation d'hydrocarbures aliphatiques |
ZA803365B (en) * | 1979-10-09 | 1981-05-27 | Mobil Oil Corp | Synthesis of large crystal zeolite zsm-5 |
JPS581045B2 (ja) * | 1979-12-21 | 1983-01-10 | 三菱瓦斯化学株式会社 | 結晶性アルミノシリケ−ト |
FR2484401A1 (fr) * | 1980-05-09 | 1981-12-18 | Elf France | Procede de deshydrocyclisation des paraffines a tres basse pression |
US4416806A (en) * | 1981-04-10 | 1983-11-22 | Elf France | Catalyst for production of aromatic hydrocarbons and process for preparation |
BE888365A (fr) * | 1981-04-10 | 1981-07-31 | Elf France | Catalyseur de production d'hydrocarbures aromatiques et son procede de preparation |
US4593133A (en) * | 1982-05-14 | 1986-06-03 | Exxon Research & Engineering Co. | Zeolite L |
US4544539A (en) * | 1982-05-14 | 1985-10-01 | Exxon Research & Engineering Co. | Zeolite L with cylindrical morphology |
US4595668A (en) * | 1983-11-10 | 1986-06-17 | Exxon Research And Engineering Co. | Bound zeolite catalyst |
US4552856A (en) * | 1983-11-10 | 1985-11-12 | Exxon Research And Engineering Co. | Zeolite catalyst and preparation thereof |
US4595669A (en) * | 1983-11-10 | 1986-06-17 | Exxon Research And Engineering Co. | Method of preparing an improved catalyst |
US4595670A (en) * | 1983-11-10 | 1986-06-17 | Exxon Research And Engineering Co. | Zeolite catalyst |
US4594145A (en) * | 1984-12-07 | 1986-06-10 | Exxon Research & Engineering Co. | Reforming process for enhanced benzene yield |
-
1983
- 1983-05-11 US US06/493,688 patent/US4544539A/en not_active Expired - Lifetime
- 1983-05-13 EP EP83302732A patent/EP0096479B1/de not_active Expired
- 1983-05-13 CA CA000428131A patent/CA1204719A/en not_active Expired
- 1983-05-13 NO NO831706A patent/NO163613C/no unknown
- 1983-05-13 JP JP58083998A patent/JPS58223614A/ja active Granted
- 1983-05-13 DE DE8383302732T patent/DE3364691D1/de not_active Expired
- 1983-05-13 ES ES522358A patent/ES522358A0/es active Granted
- 1983-05-13 GB GB08313252A patent/GB2121778A/en not_active Withdrawn
- 1983-05-13 AU AU14589/83A patent/AU558817B2/en not_active Ceased
- 1983-05-13 EP EP85105928A patent/EP0167755B1/de not_active Expired
- 1983-05-13 BR BR8302514A patent/BR8302514A/pt not_active IP Right Cessation
-
1984
- 1984-10-01 ES ES536417A patent/ES8608926A1/es not_active Expired
-
1985
- 1985-04-18 US US06/724,672 patent/US4701315A/en not_active Expired - Lifetime
-
1986
- 1986-02-10 US US06/827,753 patent/US4677236A/en not_active Expired - Lifetime
-
1990
- 1990-11-22 JP JP2320566A patent/JPH03183617A/ja active Granted
Also Published As
Publication number | Publication date |
---|---|
NO831706L (no) | 1983-11-15 |
JPH03183617A (ja) | 1991-08-09 |
ES8503311A1 (es) | 1985-02-16 |
EP0167755A1 (de) | 1986-01-15 |
JPH0597B2 (de) | 1993-01-05 |
US4677236A (en) | 1987-06-30 |
NO163613B (no) | 1990-03-19 |
ES8608926A1 (es) | 1986-07-16 |
EP0096479B1 (de) | 1986-07-23 |
BR8302514A (pt) | 1984-01-17 |
NO163613C (no) | 1990-06-27 |
JPS58223614A (ja) | 1983-12-26 |
CA1204719A (en) | 1986-05-20 |
ES522358A0 (es) | 1985-02-16 |
US4544539A (en) | 1985-10-01 |
ES536417A0 (es) | 1986-07-16 |
US4701315A (en) | 1987-10-20 |
JPH0411490B2 (de) | 1992-02-28 |
AU1458983A (en) | 1983-11-17 |
EP0167755B1 (de) | 1989-03-01 |
GB8313252D0 (en) | 1983-06-22 |
EP0096479A1 (de) | 1983-12-21 |
GB2121778A (en) | 1984-01-04 |
AU558817B2 (en) | 1987-02-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition |