BE693135A - - Google Patents

Info

Publication number
BE693135A
BE693135A BE693135DA BE693135A BE 693135 A BE693135 A BE 693135A BE 693135D A BE693135D A BE 693135DA BE 693135 A BE693135 A BE 693135A
Authority
BE
Belgium
Application number
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 filed Critical
Publication of BE693135A publication Critical patent/BE693135A/xx

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
    • B01D67/0002—Organic membrane manufacture
    • B01D67/0023—Organic membrane manufacture by inducing porosity into non porous precursor membranes
    • B01D67/003—Organic membrane manufacture by inducing porosity into non porous precursor membranes by selective elimination of components, e.g. by leaching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
    • B01D71/06—Organic material
    • B01D71/30—Polyalkenyl halides
    • B01D71/32—Polyalkenyl halides containing fluorine atoms
    • B01D71/36—Polytetrafluoroethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/26—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by elimination of a solid phase from a macromolecular composition or article, e.g. leaching out
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
    • C08K3/013—Fillers, pigments or reinforcing additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/409—Separators, membranes or diaphragms characterised by the material
    • H01M50/44—Fibrous material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
    • C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
    • C08J2327/12—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C08J2327/18—Homopolymers or copolymers of tetrafluoroethylene
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/409—Separators, membranes or diaphragms characterised by the material
    • H01M50/446—Composite material consisting of a mixture of organic and inorganic materials
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells
    • 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
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/08—Fibrillating cellular materials
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/3154—Of fluorinated addition polymer from unsaturated monomers

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Inert Electrodes (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
BE693135D 1966-01-25 1967-01-25 BE693135A (da)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US52296466 US3407096A (en) 1966-01-25 1966-01-25 Fuel cell and method for preparing the electrodes
US53034666 US3407249A (en) 1966-01-25 1966-02-28 Porous, extensively fibrillated polytetrafluoroethylene and method of preparing same

Publications (1)

Publication Number Publication Date
BE693135A true BE693135A (da) 1967-07-25

Family

ID=27060990

Family Applications (1)

Application Number Title Priority Date Filing Date
BE693135D BE693135A (da) 1966-01-25 1967-01-25

Country Status (9)

Country Link
US (2) US3407096A (da)
JP (1) JPS468589B1 (da)
BE (1) BE693135A (da)
CH (1) CH539089A (da)
DE (1) DE1669590A1 (da)
FR (1) FR1508823A (da)
GB (1) GB1169602A (da)
NL (1) NL6701023A (da)
SE (1) SE348142B (da)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2759087A1 (fr) * 1997-02-06 1998-08-07 Electricite De France Produit composite poreux de haute surface specifique, procede de preparation et electrode pour ensemble electrochimique formee d'un film composite poreux

Families Citing this family (68)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3793085A (en) * 1966-02-14 1974-02-19 Matsushita Electric Ind Co Ltd Gas diffusion electrode for cells
US3574429A (en) * 1969-06-06 1971-04-13 Lear Siegler Inc Low friction bearing and method for making same
US3661645A (en) * 1970-01-28 1972-05-09 Mc Donnell Douglas Corp Polytetrafluoroethylene battery separator and method for producing same
US3650837A (en) * 1970-04-06 1972-03-21 Leesona Corp Secondary metal/air cell
SE392582B (sv) * 1970-05-21 1977-04-04 Gore & Ass Forfarande vid framstellning av ett porost material, genom expandering och streckning av en tetrafluoretenpolymer framstelld i ett pastabildande strengsprutningsforfarande
JPS4931539B1 (da) * 1970-09-14 1974-08-22
US3935029A (en) * 1971-11-18 1976-01-27 Energy Research Corporation Method of fabricating a carbon - polytetrafluoroethylene electrode - support
BE794889A (fr) * 1972-02-04 1973-08-02 Ici Ltd Procede de fabrication d'un diaphragme poreux
JPS548193B2 (da) * 1972-06-15 1979-04-13
US3954501A (en) * 1974-01-10 1976-05-04 Guy Rampel Rechargeable electrodes utilizing unsintered fluorocarbon binder
US3898099A (en) * 1974-03-18 1975-08-05 Energy Res Corp Hydrophilic electrode and method for making the same
US4210515A (en) * 1975-02-10 1980-07-01 Basf Wyandotte Corporation Thermoplastic fibers as separator or diaphragm in electrochemical cells
US4042747A (en) * 1975-03-14 1977-08-16 Joseph A. Teti, Jr. Gasket and sealing structures of filled polytetrafluoroethylene resins
US4036729A (en) * 1975-04-10 1977-07-19 Patil Arvind S Diaphragms from discrete thermoplastic fibers requiring no bonding or cementing
GB1538810A (en) * 1976-08-10 1979-01-24 Sumitomo Electric Industries Hydrophilic porous fluorocarbon structures and process for their production
US4167469A (en) * 1976-10-29 1979-09-11 Olin Corporation Diaphragms for use in the electrolysis of alkali metal chlorides
US4166785A (en) * 1976-10-29 1979-09-04 Olin Corporation Diaphragms for use in the electrolysis of alkali metal chlorides
US4165271A (en) * 1977-10-03 1979-08-21 Olin Corporation Diaphragms for use in the electrolysis of alkali metal chlorides
US4207164A (en) * 1977-10-03 1980-06-10 Olin Corporation Diaphragms for use in the electrolysis of alkali metal chlorides
US4173662A (en) * 1977-12-23 1979-11-06 United Technologies Corporation Process for forming a fuel cell matrix
US4380521A (en) * 1978-02-13 1983-04-19 The Dow Chemical Company Method to produce a polytetra-fluoroethylene diaphragm
US4256845A (en) * 1979-02-15 1981-03-17 Glasrock Products, Inc. Porous sheets and method of manufacture
US4550123A (en) * 1979-12-28 1985-10-29 Albany International Corp. Thermally plastifiable compositions for microporous sorbent structure
US4369212A (en) * 1980-10-20 1983-01-18 Hughes Aircraft Company Process for removing residues from gas electrodes
US4339325A (en) * 1980-10-31 1982-07-13 Diamond Shamrock Corporation One pass process for forming electrode backing sheet
US4385019A (en) * 1981-01-19 1983-05-24 Mpd Technology Corporation Production of a polymeric active composition
EP0056725A3 (en) * 1981-01-19 1982-08-11 MPD Technology Corporation Polymeric electrode
US4493879A (en) * 1981-03-18 1985-01-15 Hitachi, Ltd. Fuel cell
US4560461A (en) * 1982-04-08 1985-12-24 Toagosei Chemical Industry Co., Ltd. Electrolytic cell for use in electrolysis of aqueous alkali metal chloride solutions
BR8305959A (pt) * 1982-10-29 1984-06-05 Chloride Group Plc Grampo para uso na montagem de baterias de armazenamento eletrico de multicelulas, processo de montagem de uma bateria de armazenamento eletrico, estrutura laminada e bateria de armazenamento eletrico
US4824528A (en) * 1985-07-19 1989-04-25 Allied-Signal Inc. Gas detection apparatus and method with novel electrolyte membrane
US5009971A (en) * 1987-03-13 1991-04-23 Ppg Industries, Inc. Gas recombinant separator
US4910106A (en) * 1988-08-05 1990-03-20 Hoechst Celanese Corporation Formation of halogenated polymeric microporous membranes having improved strength properties
US4997603A (en) * 1988-08-05 1991-03-05 Hoechst Celanese Corp. Process for formation of halogenated polymeric microporous membranes having improved strength properties
US5043113A (en) * 1988-08-05 1991-08-27 Hoechst Celanese Corp. Process for formation of halogenated polymeric microporous membranes having improved strength properties
US5141522A (en) * 1990-02-06 1992-08-25 American Cyanamid Company Composite material having absorbable and non-absorbable components for use with mammalian tissue
US5147539A (en) * 1990-02-23 1992-09-15 Minnesota Mining And Manufacturing Company Controlled pore composite polytetrafluoroethylene article
US5071610A (en) * 1990-02-23 1991-12-10 Minnesota Mining And Manufacturing Company Method of making a controlled pore composite polytetrafluoroethylene
US5207915A (en) * 1990-02-23 1993-05-04 Minnesota Mining And Manufacturing Company Separation method using controlled pore composite polytetrafluoroethylene article
US5110858A (en) * 1990-03-23 1992-05-05 E. I. Du Pont De Nemours And Company Tetrafluoroethylene polymer compositions containing particulate carbon
US5081188A (en) * 1990-03-23 1992-01-14 E. I. Du Pont De Nemours And Company Processing additives for tetrafluoroethylene polymers
US5019232A (en) * 1990-06-01 1991-05-28 Minnesota Mining And Manufacturing Company Medium for electrophoresis
DE4112248A1 (de) * 1991-04-15 1992-10-22 Basf Ag Verfahren zur herstellung offenporoeser, fasriger teile aus polytetrafluorethylen durch spritzguss oder extrusion
CA2108278A1 (en) * 1991-06-04 1992-12-05 Hoo Y. Chung Porous products manufactured from polytetrafluoroethylene treated with a perfluoroether fluid and methods of manufacturing such products
US5238621A (en) * 1991-06-28 1993-08-24 Minnesota Mining And Manufacturing Company Method of controlling porosity in a composite article
US5248428A (en) * 1991-06-28 1993-09-28 Minnesota Mining And Manufacturing Company Article for separations and purifications and method of controlling porosity therein
EP0630432B1 (en) * 1992-03-13 1999-07-14 Atrium Medical Corporation Controlled porosity expanded fluoropolymer (e.g. polytetrafluoroethylene) products and fabrication
US5354603A (en) * 1993-01-15 1994-10-11 Minnesota Mining And Manufacturing Company Antifouling/anticorrosive composite marine structure
US5746916A (en) * 1994-01-26 1998-05-05 Mitsubishi Rayon Co., Ltd. Microporous membrane made of non-crystalline polymers and method of producing the same
US5766750A (en) * 1994-08-25 1998-06-16 W. L. Gore & Associates, Inc. Process for making an adhesive-filler polymer film composite
US5753358A (en) * 1994-08-25 1998-05-19 W. L. Gore & Associates, Inc. Adhisive-filler polymer film composite
US5879794A (en) * 1994-08-25 1999-03-09 W. L. Gore & Associates, Inc. Adhesive-filler film composite
US5833860A (en) * 1995-08-28 1998-11-10 Millipore Investment Holdings Limited Centrifugal adsorptive sample preparation device and method
US5904978A (en) * 1995-12-15 1999-05-18 W. L. Gore & Associates, Inc. Electrically conductive polytetrafluoroethylene article
AU4902897A (en) 1996-11-08 1998-05-29 W.L. Gore & Associates, Inc. Method for improving reliability of thin circuit substrates by increasing the T of the substrate
JP2001345106A (ja) * 2000-03-31 2001-12-14 Japan Storage Battery Co Ltd 燃料電池用電極およびその製造方法
US6770086B1 (en) * 2000-11-02 2004-08-03 Scimed Life Systems, Inc. Stent covering formed of porous polytetraflouroethylene
CA2620629A1 (en) * 2005-09-02 2007-03-08 California Institute Of Technology Method and apparatus for the mechanical actuation of valves in fluidic devices
US7862000B2 (en) * 2006-02-03 2011-01-04 California Institute Of Technology Microfluidic method and structure with an elastomeric gas-permeable gasket
WO2008039875A1 (en) * 2006-09-28 2008-04-03 California Institute Of Technology System and method for interfacing with a microfluidic chip
US8071035B2 (en) * 2007-04-12 2011-12-06 Siemens Medical Solutions Usa, Inc. Microfluidic radiosynthesis system for positron emission tomography biomarkers
WO2008137873A1 (en) * 2007-05-04 2008-11-13 Materials & Electrochemical Research Corp. Reduced-weight container and/or tube for compressed gases and liquids
US20100093098A1 (en) * 2008-10-14 2010-04-15 Siemens Medical Solutions Nonflow-through appratus and mehod using enhanced flow mechanisms
WO2010095601A1 (ja) * 2009-02-19 2010-08-26 日本バルカー工業株式会社 機能性成形体およびその製造方法
MX2011009115A (es) * 2011-08-31 2013-02-28 Mexicano Inst Petrol Aparato modular para la medicion de conductividad ionica, electronica y mixta para membranas polimericas y ceramicas.
CN103379681B (zh) * 2012-04-28 2016-03-30 清华大学 加热垫
EP3823066B1 (en) * 2018-07-10 2023-09-27 Teijin Limited Nonaqueous secondary battery binder and liquid dispersion thereof
CN114874485B (zh) * 2022-06-22 2023-03-10 山东大学 一种高导热聚四氟乙烯纳米纤维膜及其制造工艺

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US3003912A (en) * 1954-04-27 1961-10-10 Du Pont Making paper from tetrafluoroethylene polymers
US3198667A (en) * 1961-03-31 1965-08-03 Exxon Research Engineering Co Method of impregnating porous electrode with catalyst
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US3202733A (en) * 1962-03-06 1965-08-24 Esb Reeves Corp Method of making microporous plastic
US3315020A (en) * 1962-03-21 1967-04-18 Gore & Ass Process for preparing biaxially fibrillated sheets
NL297213A (da) * 1962-08-28
DE1287051B (de) * 1962-09-07 1969-01-16 Bosch Gmbh Robert Verfahren zur Herstellung von poroesen Gasdiffusionselektroden mit Raney-Katalysatoren
US3120457A (en) * 1962-11-23 1964-02-04 Electric Storage Battery Co Method of manufacturing fuel cell and/or battery electrode
US3323978A (en) * 1963-05-09 1967-06-06 Phillips Petroleum Co Artificial textile fibres and their production
US3242246A (en) * 1963-06-14 1966-03-22 Sealectro Corp Method of preparing polytetrafluoroethylene articles
US3265557A (en) * 1964-01-09 1966-08-09 Atlantic Res Corp Fibrous compositions
US3281511A (en) * 1964-05-15 1966-10-25 Gen Plastics Corp Method of preparing microporous tetrafluoroethylene resin sheets

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2759087A1 (fr) * 1997-02-06 1998-08-07 Electricite De France Produit composite poreux de haute surface specifique, procede de preparation et electrode pour ensemble electrochimique formee d'un film composite poreux
WO1998034977A1 (fr) * 1997-02-06 1998-08-13 Electricite De France (Service National) Produit composite poreux notamment de haute surface specifique, procede de preparation et electrode pour ensemble electrochimique formee d'un film composite poreux
US6702965B2 (en) 1997-02-06 2004-03-09 Bollore Method of forming a porous composite product, in particular with a high specific surface
US6962745B2 (en) 1997-02-06 2005-11-08 Bollore Porous composite product particularly with high specific surface area, method for preparing and electrode for electrochemical assembly formed with a porous composite film
US7384686B2 (en) 1997-02-06 2008-06-10 Bollore Porous composite product in particular with a high specific surface preparation process and electrode formed of a porous composite film for an electro-chemical assembly
CN1341679B (zh) * 1997-02-06 2010-04-28 鲍劳赫公司 多孔复合膜的制备方法

Also Published As

Publication number Publication date
CH539089A (de) 1973-07-15
SE348142B (da) 1972-08-28
JPS468589B1 (da) 1971-03-04
NL6701023A (da) 1967-07-26
US3407249A (en) 1968-10-22
US3407096A (en) 1968-10-22
FR1508823A (fr) 1968-01-05
DE1669590A1 (de) 1972-01-05
GB1169602A (en) 1969-11-05

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