FR2089415A5 - - Google Patents

Info

Publication number
FR2089415A5
FR2089415A5 FR7112532A FR7112532A FR2089415A5 FR 2089415 A5 FR2089415 A5 FR 2089415A5 FR 7112532 A FR7112532 A FR 7112532A FR 7112532 A FR7112532 A FR 7112532A FR 2089415 A5 FR2089415 A5 FR 2089415A5
Authority
FR
France
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
FR7112532A
Inventor
Jr R H Wentorf
W A Rocco
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.)
General Electric Co
Original Assignee
General Electric Co
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=21833105&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=FR2089415(A5) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by General Electric Co filed Critical General Electric Co
Application granted granted Critical
Publication of FR2089415A5 publication Critical patent/FR2089415A5/fr
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
    • B24D3/04—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic
    • B24D3/06—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic metallic or mixture of metals with ceramic materials, e.g. hard metals, "cermets", cements
    • B24D3/10—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic metallic or mixture of metals with ceramic materials, e.g. hard metals, "cermets", cements for porous or cellular structure, e.g. for use with diamonds as abrasives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
    • B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/28—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/001—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as supporting member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
    • B24D3/04—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic
    • B24D3/06—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic metallic or mixture of metals with ceramic materials, e.g. hard metals, "cermets", cements
    • B24D3/08—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic metallic or mixture of metals with ceramic materials, e.g. hard metals, "cermets", cements for close-grained structure, e.g. using metal with low melting point
    • 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
    • B01J2203/00—Processes utilising sub- or super atmospheric pressure
    • B01J2203/06—High pressure synthesis
    • B01J2203/0605—Composition of the material to be processed
    • B01J2203/0645—Boronitrides
    • 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
    • B01J2203/00—Processes utilising sub- or super atmospheric pressure
    • B01J2203/06—High pressure synthesis
    • B01J2203/0675—Structural or physico-chemical features of the materials processed
    • B01J2203/0685—Crystal sintering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F2005/001—Cutting tools, earth boring or grinding tool other than table ware
FR7112532A 1970-04-08 1971-04-08 Expired FR2089415A5 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US2666070A 1970-04-08 1970-04-08

Publications (1)

Publication Number Publication Date
FR2089415A5 true FR2089415A5 (fr) 1972-01-07

Family

ID=21833105

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7112532A Expired FR2089415A5 (fr) 1970-04-08 1971-04-08

Country Status (11)

Country Link
JP (2) JPS5212126B1 (fr)
BE (1) BE765475A (fr)
CA (1) CA974045A (fr)
CH (1) CH554209A (fr)
DE (2) DE2117056B2 (fr)
ES (2) ES389963A1 (fr)
FR (1) FR2089415A5 (fr)
GB (1) GB1349385A (fr)
LU (1) LU62950A1 (fr)
NL (1) NL7104326A (fr)
SE (1) SE376731B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2434130A1 (fr) * 1978-08-26 1980-03-21 Sumitomo Electric Industries Corps de diamant fritte et son procede de fabrication
EP0208414A2 (fr) * 1985-06-07 1987-01-14 De Beers Industrial Diamond Division (Proprietary) Limited Corps compact et abrasif en diamant thermiquement stable
EP0398776A1 (fr) * 1989-05-17 1990-11-22 Supradiamant Outil composite comportant une partie active en diamant polycristallin
US5172778A (en) * 1991-11-14 1992-12-22 Baker-Hughes, Inc. Drill bit cutter and method for reducing pressure loading of cutters

Families Citing this family (66)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2259538C3 (de) * 1972-12-05 1982-03-25 Institut fiziki vysokich davlenij Akademii Nauk SSSR, Akademgorodok, Moskovskaya oblast' Verfahren zur Herstellung von Diamant-Metall-Werkstoffen
AU512633B2 (en) * 1976-12-21 1980-10-23 Sumitomo Electric Industries, Ltd. Sintered tool
IE46644B1 (en) * 1977-02-18 1983-08-10 Gen Electric Temperature resistant abrasive compact and method for making same
ZA771274B (en) * 1977-03-03 1978-10-25 De Beers Ind Diamond Abrasive bodies
ZA771273B (en) * 1977-03-03 1978-10-25 De Beers Ind Diamond Abrasive bodies
DE2719330C3 (de) * 1977-04-30 1984-01-05 Christensen, Inc., 84115 Salt Lake City, Utah Drehbohrmeißel
US4124401A (en) * 1977-10-21 1978-11-07 General Electric Company Polycrystalline diamond body
DE2860571D1 (en) 1977-12-22 1981-04-16 De Beers Ind Diamond Shaping diamond compacts
ZA781154B (en) * 1978-02-28 1979-09-26 De Beers Ind Diamond Abrasive bodies
JPS5823353B2 (ja) * 1978-05-17 1983-05-14 住友電気工業株式会社 切削工具用焼結体とその製造法
AU529416B2 (en) * 1978-07-04 1983-06-09 Sumitomo Electric Industries, Ltd. Diamond compact for a wire drawing die
IE48798B1 (en) * 1978-08-18 1985-05-15 De Beers Ind Diamond Method of making tool inserts,wire-drawing die blank and drill bit comprising such inserts
IL60042A (en) * 1979-05-16 1983-05-15 De Beers Ind Diamond Abrasive bodies
CA1193870A (fr) * 1980-08-14 1985-09-24 Peter N. Tomlinson Produit abrasif
JPS603922B2 (ja) * 1980-09-03 1985-01-31 日本油脂株式会社 切削工具
JPS6176534A (ja) * 1984-09-21 1986-04-19 Toa Nenryo Kogyo Kk ポリエチレンフイルム
ZA862903B (en) * 1985-04-29 1987-11-25 Smith International Composite polycrystalline diamond compact
AU577958B2 (en) * 1985-08-22 1988-10-06 De Beers Industrial Diamond Division (Proprietary) Limited Abrasive compact
JPS63125602A (ja) * 1986-11-12 1988-05-28 Sumitomo Electric Ind Ltd 工具用硬質合金
DE3706641A1 (de) * 1987-03-02 1988-09-15 Hilti Ag Hohlbohrer
FR2623201B1 (fr) * 1987-11-17 1993-04-16 Combustible Nucleaire Produit abrasif diamante composite, son procede de preparation et les outils de forage ou d'usinage qui en sont equipes
US4807402A (en) * 1988-02-12 1989-02-28 General Electric Company Diamond and cubic boron nitride
AU624521B2 (en) * 1989-07-07 1992-06-11 De Beers Industrial Diamond Division (Proprietary) Limited Manufacture of an abrasive body
US6248447B1 (en) 1999-09-03 2001-06-19 Camco International (Uk) Limited Cutting elements and methods of manufacture thereof
US6592985B2 (en) 2000-09-20 2003-07-15 Camco International (Uk) Limited Polycrystalline diamond partially depleted of catalyzing material
GB2408735B (en) 2003-12-05 2009-01-28 Smith International Thermally-stable polycrystalline diamond materials and compacts
US7647993B2 (en) 2004-05-06 2010-01-19 Smith International, Inc. Thermally stable diamond bonded materials and compacts
JP2006026870A (ja) * 2004-07-21 2006-02-02 Ishizuka Kenkyusho:Kk 超砥粒焼結体スローアウェイチップ
US7754333B2 (en) 2004-09-21 2010-07-13 Smith International, Inc. Thermally stable diamond polycrystalline diamond constructions
US7608333B2 (en) 2004-09-21 2009-10-27 Smith International, Inc. Thermally stable diamond polycrystalline diamond constructions
US7681669B2 (en) 2005-01-17 2010-03-23 Us Synthetic Corporation Polycrystalline diamond insert, drill bit including same, and method of operation
US7350601B2 (en) 2005-01-25 2008-04-01 Smith International, Inc. Cutting elements formed from ultra hard materials having an enhanced construction
US8197936B2 (en) 2005-01-27 2012-06-12 Smith International, Inc. Cutting structures
CA2535387C (fr) 2005-02-08 2013-05-07 Smith International, Inc. Elements polycristallin pour la decoupe du diamant thermiquement stable et outils comportant ces elements
US7493973B2 (en) 2005-05-26 2009-02-24 Smith International, Inc. Polycrystalline diamond materials having improved abrasion resistance, thermal stability and impact resistance
US7377341B2 (en) 2005-05-26 2008-05-27 Smith International, Inc. Thermally stable ultra-hard material compact construction
US8020643B2 (en) 2005-09-13 2011-09-20 Smith International, Inc. Ultra-hard constructions with enhanced second phase
US7726421B2 (en) 2005-10-12 2010-06-01 Smith International, Inc. Diamond-bonded bodies and compacts with improved thermal stability and mechanical strength
US7628234B2 (en) 2006-02-09 2009-12-08 Smith International, Inc. Thermally stable ultra-hard polycrystalline materials and compacts
US8066087B2 (en) 2006-05-09 2011-11-29 Smith International, Inc. Thermally stable ultra-hard material compact constructions
US8002859B2 (en) 2007-02-06 2011-08-23 Smith International, Inc. Manufacture of thermally stable cutting elements
US7942219B2 (en) 2007-03-21 2011-05-17 Smith International, Inc. Polycrystalline diamond constructions having improved thermal stability
US8499861B2 (en) 2007-09-18 2013-08-06 Smith International, Inc. Ultra-hard composite constructions comprising high-density diamond surface
US8627904B2 (en) 2007-10-04 2014-01-14 Smith International, Inc. Thermally stable polycrystalline diamond material with gradient structure
US7980334B2 (en) 2007-10-04 2011-07-19 Smith International, Inc. Diamond-bonded constructions with improved thermal and mechanical properties
US9297211B2 (en) 2007-12-17 2016-03-29 Smith International, Inc. Polycrystalline diamond construction with controlled gradient metal content
US8083012B2 (en) 2008-10-03 2011-12-27 Smith International, Inc. Diamond bonded construction with thermally stable region
US7972395B1 (en) 2009-04-06 2011-07-05 Us Synthetic Corporation Superabrasive articles and methods for removing interstitial materials from superabrasive materials
US8951317B1 (en) 2009-04-27 2015-02-10 Us Synthetic Corporation Superabrasive elements including ceramic coatings and methods of leaching catalysts from superabrasive elements
US8590130B2 (en) 2009-05-06 2013-11-26 Smith International, Inc. Cutting elements with re-processed thermally stable polycrystalline diamond cutting layers, bits incorporating the same, and methods of making the same
US8771389B2 (en) 2009-05-06 2014-07-08 Smith International, Inc. Methods of making and attaching TSP material for forming cutting elements, cutting elements having such TSP material and bits incorporating such cutting elements
WO2010148313A2 (fr) 2009-06-18 2010-12-23 Smith International, Inc. Éléments de coupe en diamant polycristallin avec porosité artificielle et procédé de fabrication de tels éléments de coupe
US9352447B2 (en) 2009-09-08 2016-05-31 Us Synthetic Corporation Superabrasive elements and methods for processing and manufacturing the same using protective layers
US9144886B1 (en) 2011-08-15 2015-09-29 Us Synthetic Corporation Protective leaching cups, leaching trays, and methods for processing superabrasive elements using protective leaching cups and leaching trays
DE102012001732B4 (de) * 2012-01-31 2022-11-10 Kennametal Inc. Werkzeugkopf für ein modulares Schaftwerkzeug, Schaftwerkzeug mit einem solchen Werkzeugkopf sowie Herstellungsverfahren für einen Werkzeugkopf
WO2013188688A2 (fr) 2012-06-13 2013-12-19 Varel International Ind., L.P. Outils de coupe au diamant polycristallin (pcd) présentant une meilleure résistance et une meilleure stabilité thermique
US9550276B1 (en) 2013-06-18 2017-01-24 Us Synthetic Corporation Leaching assemblies, systems, and methods for processing superabrasive elements
US9789587B1 (en) 2013-12-16 2017-10-17 Us Synthetic Corporation Leaching assemblies, systems, and methods for processing superabrasive elements
US10807913B1 (en) 2014-02-11 2020-10-20 Us Synthetic Corporation Leached superabrasive elements and leaching systems methods and assemblies for processing superabrasive elements
US9908215B1 (en) 2014-08-12 2018-03-06 Us Synthetic Corporation Systems, methods and assemblies for processing superabrasive materials
US11766761B1 (en) 2014-10-10 2023-09-26 Us Synthetic Corporation Group II metal salts in electrolytic leaching of superabrasive materials
US10011000B1 (en) 2014-10-10 2018-07-03 Us Synthetic Corporation Leached superabrasive elements and systems, methods and assemblies for processing superabrasive materials
US10723626B1 (en) 2015-05-31 2020-07-28 Us Synthetic Corporation Leached superabrasive elements and systems, methods and assemblies for processing superabrasive materials
CN107186633B (zh) * 2017-05-24 2023-04-25 广东奔朗新材料股份有限公司 一种高性能金属结合剂金刚石滚刀的制备方法
US10900291B2 (en) 2017-09-18 2021-01-26 Us Synthetic Corporation Polycrystalline diamond elements and systems and methods for fabricating the same
CN114082956A (zh) * 2021-11-10 2022-02-25 深圳市海明润超硬材料股份有限公司 一种金刚石热压焊头及其制备方法

Citations (8)

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Publication number Priority date Publication date Assignee Title
GB359637A (en) * 1929-09-05 1931-10-29 British Thomson Houston Co Ltd Improvements in or relating to cutting tools
US2216908A (en) * 1936-07-16 1940-10-08 Metal Carbides Corp Industrial diamond wheel
US2228871A (en) * 1939-03-14 1941-01-14 Metal Carbides Corp Diamond bearing tool and process of making same
FR928824A (fr) * 1943-04-29 1947-12-09 Perfectionnements aux procédés de fabrication des outils abrasifs
US2582231A (en) * 1949-02-05 1952-01-15 Wheel Trueing Tool Co Abrasive tool and method of making same
FR1305660A (fr) * 1960-10-03 1962-10-05 Gen Electric Produit compact formé par plusieurs petits cristaux de diamant ou analogues et procédé pour sa fabrication
US3141746A (en) * 1960-10-03 1964-07-21 Gen Electric Diamond compact abrasive
US3178273A (en) * 1961-01-07 1965-04-13 Libal Herbert Method of producing tool surface layers containing diamond particles

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DE611860C (de) * 1929-04-23 1935-04-08 Aeg Verfahren zur Herstellung einer Diamantstaub enthaltenden harten Sinterlegierung und daraus bestehender Werkzeuge
DE627862C (de) * 1929-09-05 1936-03-24 Aeg Werkzeugschneide und Verfahren zu ihrer Herstellung
US1895926A (en) * 1929-09-05 1933-01-31 Gen Electric Method of forming diamond charged cutting tool bits
US2476699A (en) * 1945-11-06 1949-07-19 Norton Co Diamond abrasive
US2818850A (en) * 1955-07-06 1958-01-07 Cons Diamond Tool Corp Cut off blades for abrasive bodies and their production
USRE24576E (en) * 1956-08-27 1958-12-16 Diamond cut-off wheel
US3101260A (en) * 1957-08-09 1963-08-20 Gen Electric Diamond tool
US2947609A (en) * 1958-01-06 1960-08-02 Gen Electric Diamond synthesis
US2941248A (en) * 1958-01-06 1960-06-21 Gen Electric High temperature high pressure apparatus
US2947610A (en) * 1958-01-06 1960-08-02 Gen Electric Method of making diamonds
NL129734C (fr) * 1960-07-22
US3030662A (en) * 1961-05-24 1962-04-24 Gen Electric Pressure distribution in reaction vessels
US3293012A (en) * 1962-11-27 1966-12-20 Exxon Production Research Co Process of infiltrating diamond particles with metallic binders
US3297407A (en) * 1962-12-10 1967-01-10 Gen Electric Method of growing diamond on a diamond seed crystal
SE305791B (fr) * 1964-02-06 1968-11-04 Diadur Ab
US3407445A (en) * 1966-03-02 1968-10-29 Gen Electric High pressure reaction vessel for the preparation of diamond

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB359637A (en) * 1929-09-05 1931-10-29 British Thomson Houston Co Ltd Improvements in or relating to cutting tools
US2216908A (en) * 1936-07-16 1940-10-08 Metal Carbides Corp Industrial diamond wheel
US2228871A (en) * 1939-03-14 1941-01-14 Metal Carbides Corp Diamond bearing tool and process of making same
FR928824A (fr) * 1943-04-29 1947-12-09 Perfectionnements aux procédés de fabrication des outils abrasifs
US2582231A (en) * 1949-02-05 1952-01-15 Wheel Trueing Tool Co Abrasive tool and method of making same
FR1305660A (fr) * 1960-10-03 1962-10-05 Gen Electric Produit compact formé par plusieurs petits cristaux de diamant ou analogues et procédé pour sa fabrication
US3141746A (en) * 1960-10-03 1964-07-21 Gen Electric Diamond compact abrasive
US3178273A (en) * 1961-01-07 1965-04-13 Libal Herbert Method of producing tool surface layers containing diamond particles

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2434130A1 (fr) * 1978-08-26 1980-03-21 Sumitomo Electric Industries Corps de diamant fritte et son procede de fabrication
EP0208414A2 (fr) * 1985-06-07 1987-01-14 De Beers Industrial Diamond Division (Proprietary) Limited Corps compact et abrasif en diamant thermiquement stable
EP0208414A3 (en) * 1985-06-07 1987-11-04 De Beers Industrial Diamond Division (Proprietary) Limited Thermally stable diamond abrasive compact body
EP0398776A1 (fr) * 1989-05-17 1990-11-22 Supradiamant Outil composite comportant une partie active en diamant polycristallin
FR2647153A1 (fr) * 1989-05-17 1990-11-23 Combustible Nucleaire Outil composite comportant une partie active en diamant polycristallin et procede de fabrication de cet outil
US4984642A (en) * 1989-05-17 1991-01-15 Societe Industrielle De Combustible Nucleaire Composite tool comprising a polycrystalline diamond active part
US5172778A (en) * 1991-11-14 1992-12-22 Baker-Hughes, Inc. Drill bit cutter and method for reducing pressure loading of cutters

Also Published As

Publication number Publication date
DE2117056C3 (fr) 1987-07-30
DE2117056B2 (de) 1979-05-23
DE2167151B1 (de) 1980-05-08
ES389963A1 (es) 1974-03-01
CH554209A (de) 1974-09-30
NL7104326A (fr) 1971-10-12
ES417438A1 (es) 1976-03-16
LU62950A1 (fr) 1971-08-26
JPS6124360B2 (fr) 1986-06-10
JPS53134009A (en) 1978-11-22
DE2167151C3 (fr) 1987-07-09
SE376731B (fr) 1975-06-09
DE2117056A1 (de) 1971-10-21
BE765475A (fr) 1971-08-30
GB1349385A (en) 1974-04-03
CA974045A (en) 1975-09-09
JPS5212126B1 (fr) 1977-04-05

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