GB2160517B - Synthetic zeolites - Google Patents

Synthetic zeolites

Info

Publication number
GB2160517B
GB2160517B GB08515366A GB8515366A GB2160517B GB 2160517 B GB2160517 B GB 2160517B GB 08515366 A GB08515366 A GB 08515366A GB 8515366 A GB8515366 A GB 8515366A GB 2160517 B GB2160517 B GB 2160517B
Authority
GB
United Kingdom
Prior art keywords
synthetic zeolites
zeolites
synthetic
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
Application number
GB08515366A
Other versions
GB8515366D0 (en
GB2160517A (en
Inventor
Patrice Rouet
Pierre Dufresne
Jean-Louis Guth
Raymond Wey
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.)
IFP Energies Nouvelles IFPEN
Original Assignee
IFP Energies Nouvelles IFPEN
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 IFP Energies Nouvelles IFPEN filed Critical IFP Energies Nouvelles IFPEN
Publication of GB8515366D0 publication Critical patent/GB8515366D0/en
Publication of GB2160517A publication Critical patent/GB2160517A/en
Application granted granted Critical
Publication of GB2160517B publication Critical patent/GB2160517B/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C1/00Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon
    • C07C1/20Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as heteroatoms
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/10Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
    • B01J20/16Alumino-silicates
    • B01J20/18Synthetic zeolitic molecular sieves
    • B01J20/186Chemical treatments in view of modifying the properties of the sieve, e.g. increasing the stability or the activity, also decreasing the activity
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J29/00Catalysts comprising molecular sieves
    • B01J29/04Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/08Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y
    • B01J29/084Y-type faujasite
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J29/00Catalysts comprising molecular sieves
    • B01J29/04Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/50Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the erionite or offretite type, e.g. zeolite T, as exemplified by patent document US2950952
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J29/00Catalysts comprising molecular sieves
    • B01J29/04Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/60Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the type L, as exemplified by patent document US3216789
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J29/00Catalysts comprising molecular sieves
    • B01J29/04Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/65Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the ferrierite type, e.g. types ZSM-21, ZSM-35 or ZSM-38, as exemplified by patent documents US4046859, US4016245 and US4046859, respectively
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J29/00Catalysts comprising molecular sieves
    • B01J29/04Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/70Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
    • B01J29/7011MAZ-type, e.g. Mazzite, Omega, ZSM-4 or LZ-202
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B39/00Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
    • C01B39/02Crystalline 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
    • C01B39/20Faujasite type, e.g. type X or Y
    • C01B39/24Type Y
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B39/00Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
    • C01B39/02Crystalline 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
    • C01B39/30Erionite or offretite type, e.g. zeolite T
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B39/00Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
    • C01B39/02Crystalline 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
    • C01B39/30Erionite or offretite type, e.g. zeolite T
    • C01B39/305Erionite or offretite type, e.g. zeolite T using at least one organic template directing agent
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B39/00Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
    • C01B39/02Crystalline 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
    • C01B39/32Type L
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B39/00Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
    • C01B39/02Crystalline 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
    • C01B39/34Type ZSM-4
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B39/00Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
    • C01B39/02Crystalline 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
    • C01B39/44Ferrierite type, e.g. types ZSM-21, ZSM-35 or ZSM-38
    • C01B39/445Ferrierite type, e.g. types ZSM-21, ZSM-35 or ZSM-38 using at least one organic template directing agent
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C5/00Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms
    • C07C5/32Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by dehydrogenation with formation of free hydrogen
    • C07C5/373Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by dehydrogenation with formation of free hydrogen with simultaneous isomerisation
    • C07C5/393Preparation 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
    • C07C5/41Catalytic processes
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2529/00Catalysts comprising molecular sieves
    • C07C2529/04Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites, pillared clays
    • C07C2529/06Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • C07C2529/50Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the eroionite or offretite type, e.g. zeolite T
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2529/00Catalysts comprising molecular sieves
    • C07C2529/04Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites, pillared clays
    • C07C2529/06Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • C07C2529/60Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the type L
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/50Improvements relating to the production of bulk chemicals
    • Y02P20/52Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Materials Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Silicates, Zeolites, And Molecular Sieves (AREA)
  • Catalysts (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
GB08515366A 1984-06-18 1985-06-18 Synthetic zeolites Expired GB2160517B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8409619A FR2565847B1 (en) 1984-06-18 1984-06-18 SYNTHESIS AND USE OF PREFORMED ZEOLITHS

Publications (3)

Publication Number Publication Date
GB8515366D0 GB8515366D0 (en) 1985-07-17
GB2160517A GB2160517A (en) 1985-12-24
GB2160517B true GB2160517B (en) 1988-04-27

Family

ID=9305211

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08515366A Expired GB2160517B (en) 1984-06-18 1985-06-18 Synthetic zeolites

Country Status (6)

Country Link
JP (1) JPS6114117A (en)
CN (1) CN85104995A (en)
DE (1) DE3521675A1 (en)
FR (1) FR2565847B1 (en)
GB (1) GB2160517B (en)
NL (1) NL8501731A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8562941B2 (en) 2005-12-20 2013-10-22 Exxonmobil Research And Engineering Company Perturbed synthesis of materials

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0308558A1 (en) * 1987-09-25 1989-03-29 Mobil Oil Corporation A process for preparing a macrostructural unit having a catalytically-active zeolite surface
GB8704365D0 (en) * 1987-02-25 1987-04-01 Exxon Chemical Patents Inc Zeolite l preparation
GB8801067D0 (en) * 1988-01-19 1988-02-17 Exxon Chemical Patents Inc Zeolite l preparation
DE3927034A1 (en) * 1989-08-16 1991-02-28 Degussa PROCESS FOR THE PREPARATION OF ZEOLITE Y
GB9101456D0 (en) * 1991-01-23 1991-03-06 Exxon Chemical Patents Inc Process for producing substantially binder-free zeolite
FR2698862B1 (en) * 1992-12-08 1995-01-13 Elf Aquitaine Process for the synthesis of a crystalline aluminosilicate enriched in silica, having the structure of mazzite, the aluminosilicate obtained and its use as a catalyst for the transformation of hydrocarbons.
EP0674600B1 (en) * 1992-12-16 2001-10-17 Chevron U.S.A. Inc. Preparation of aluminosilicate zeolites
US5716593A (en) * 1996-07-31 1998-02-10 Chevron U.S.A. Inc. Preparation of Y-type faujasite using an organic template
US5785944A (en) * 1996-07-31 1998-07-28 Chevron U.S.A. Inc. Preparation of Y zeolite
US5785945A (en) * 1996-07-31 1998-07-28 Chevron Chemical Company Llc Preparation of zeolite L
AU7802198A (en) * 1997-05-29 1998-12-30 Exxon Chemical Patents Inc. Preparation of zeolite-bound fau structure type zeolite and use thereof
CA2316664A1 (en) * 1999-08-25 2001-02-25 Vadim Guliants Novel adsorbents for preferential nitrogen adsorption from other gases
JP2001087647A (en) * 1999-08-25 2001-04-03 Praxair Technol Inc Innovative adsorbent for selectively adsorbing nitrogen from other gas
DE19951781A1 (en) 1999-10-27 2001-05-03 Sued Chemie Ag Process for the production of synthetic zeolites with MFI structure
US6261534B1 (en) 1999-11-24 2001-07-17 Chevron U.S.A. Inc. Method for making ZSM-5 zeolites
US6632415B2 (en) 2001-04-09 2003-10-14 Chevron U.S.A. Inc. Methods for making molecular sieves
US20050063901A1 (en) * 2003-09-24 2005-03-24 Miller Stephen J. Preparation of molecular sieves involving spray drying
US7837977B2 (en) 2005-09-13 2010-11-23 Chevron U.S.A. Inc. Preparation of titanosilicate zeolite TS-1
ES2304308B1 (en) * 2007-03-23 2009-08-07 Consejo Superior Investg.Cientificas PROCEDURE FOR PREPARATION OF AN ALUMINOSILICATE WITH FERRIERITE TYPE STRUCTURE FROM GELS CONTAINING TETRAMETILAMONY AND BENCIL-METHYL PIRROLIDINY, AND ITS APPLICATIONS.
JP5577587B2 (en) 2008-11-25 2014-08-27 株式会社明電舎 Process for producing lower hydrocarbon aromatization catalyst and lower hydrocarbon aromatization catalyst
CN102476809B (en) * 2010-11-29 2013-08-21 中国科学院大连化学物理研究所 Method for preparing Ba-containing L zeolite from kaolin performer
JP6201518B2 (en) * 2013-08-21 2017-09-27 東ソー株式会社 Catalyst for producing C5-C6 compounds
CN107974276B (en) * 2016-10-21 2019-10-25 中国石油化工股份有限公司 A kind of vapour oil treatment process
CN107974292B (en) * 2016-10-21 2019-10-25 中国石油化工股份有限公司 A kind of vapour oil treatment process
CN110668411B (en) * 2019-11-18 2021-03-23 江苏华盛锂电材料股份有限公司 Purification method of lithium bis (fluorosulfonyl) imide
CN111282542B (en) * 2019-11-20 2023-05-16 复榆(张家港)新材料科技有限公司 Method for synthesizing nano K, ca-CHA zeolite

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3262890A (en) * 1960-10-05 1966-07-26 Union Carbide Corp Manufacture of shaped crystalline zeolitic molecular sieve bodies
DE1179918B (en) * 1960-11-25 1964-10-22 Union Carbide Corp Process for the production of porous adsorbent bodies
FR1310548A (en) * 1961-09-06 1962-11-30 Union Carbide Corp Process for the production of synthetic crystalline zeolites of the molecular sieve type
DE1567714C3 (en) * 1965-11-24 1979-01-18 Mobil Oil Corp., New York, N.Y. (V.St.A.) Crystalline aluminosilicate zeolite
GB1173754A (en) * 1965-12-20 1969-12-10 Grace W R & Co Improvements in or relating to Zeolitic Molecular Sieves
SE335116B (en) * 1966-08-03 1971-05-17 Union Carbide Corp
GB1161816A (en) * 1966-12-12 1969-08-20 Universal Oil Prod Co Crystalline Zeolites, their Production and their Use in Catalytic Treatment of Hydrocarbons.
FR1507096A (en) * 1967-01-02 1967-12-22 Universal Oil Prod Co Process for the preparation of crystalline zeolites
CA950888A (en) * 1968-12-30 1974-07-09 Charles J. Plank Crystallization of zeolite
JPS5422953B1 (en) * 1969-01-02 1979-08-10
JPS5333557B1 (en) * 1969-10-22 1978-09-14
NL7018223A (en) * 1969-12-18 1971-06-22
CA990708A (en) * 1970-09-24 1976-06-08 Warren S. Briggs Process for preparing a zeolite containing petroleum cracking catalyst
US4091007A (en) * 1972-12-01 1978-05-23 Mobil Oil Corporation Preparation of zeolites
FR2513983B1 (en) * 1981-09-14 1986-10-24 Raffinage Cie Francaise PROCESS FOR THE PREPARATION OF SYNTHETIC ZEOLITES AND ZEOLITES OBTAINED BY THIS PROCESS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8562941B2 (en) 2005-12-20 2013-10-22 Exxonmobil Research And Engineering Company Perturbed synthesis of materials

Also Published As

Publication number Publication date
GB8515366D0 (en) 1985-07-17
GB2160517A (en) 1985-12-24
CN85104995A (en) 1987-01-14
NL8501731A (en) 1986-01-16
DE3521675A1 (en) 1985-12-19
FR2565847A1 (en) 1985-12-20
FR2565847B1 (en) 1986-08-29
JPS6114117A (en) 1986-01-22

Similar Documents

Publication Publication Date Title
GB2160517B (en) Synthetic zeolites
GB2195336B (en) Intermediate
IL90300A (en) Substituted aminobenzonitriles
GB8512393D0 (en) Uretero-renoscope
EP0150447A3 (en) Substituted dihydrobenzopyran-2-carboxylates
GB8528210D0 (en) Armrest-attaching mechanisms
EG18115A (en) Zeolite l preparation
GB8318336D0 (en) Zeolites
EP0186886A3 (en) Tractor-semitrailer combination
CS323585A2 (en) Zpusob vyroby topickeho farmaceutickeho pripravku
CS855284A1 (en) Adaptalni izolasticke kycelni andoproteza
GB8521151D0 (en) Synthetic smectities
DE3571335D1 (en) Stop
GB8400094D0 (en) Securing
ZA856582B (en) Substituted carbonylphenylsulphonylguanidines
ZA854165B (en) Substituted phenylsuphonylureas
ZA856592B (en) Substituted arylsulphonylguanidines
GB2160188B (en) Synthetic zeolites
GB8404661D0 (en) Central electro-analgesia
GB2158056B (en) Zeolites
GB2192884B (en) Substituted ethanediimidamides
GB8429121D0 (en) Zeolites
ZA857138B (en) Sanitant arrangement
GB8412054D0 (en) Mechanisms
CS312884A1 (en) Mereni diametru dratu

Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930618