BE765475A - DIAMOND TOOL FOR MACHINING - Google Patents
DIAMOND TOOL FOR MACHININGInfo
- Publication number
- BE765475A BE765475A BE765475A BE765475A BE765475A BE 765475 A BE765475 A BE 765475A BE 765475 A BE765475 A BE 765475A BE 765475 A BE765475 A BE 765475A BE 765475 A BE765475 A BE 765475A
- Authority
- BE
- Belgium
- Prior art keywords
- machining
- diamond tool
- diamond
- tool
- Prior art date
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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Composite Materials (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Powder Metallurgy (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US2666070A | 1970-04-08 | 1970-04-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
BE765475A true BE765475A (en) | 1971-08-30 |
Family
ID=21833105
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE765475A BE765475A (en) | 1970-04-08 | 1971-04-08 | DIAMOND TOOL FOR MACHINING |
Country Status (11)
Country | Link |
---|---|
JP (2) | JPS5212126B1 (en) |
BE (1) | BE765475A (en) |
CA (1) | CA974045A (en) |
CH (1) | CH554209A (en) |
DE (2) | DE2167151C3 (en) |
ES (2) | ES389963A1 (en) |
FR (1) | FR2089415A5 (en) |
GB (1) | GB1349385A (en) |
LU (1) | LU62950A1 (en) |
NL (1) | NL7104326A (en) |
SE (1) | SE376731B (en) |
Families Citing this family (71)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2259538C3 (en) * | 1972-12-05 | 1982-03-25 | Institut fiziki vysokich davlenij Akademii Nauk SSSR, Akademgorodok, Moskovskaya oblast' | Process for the production of diamond metal materials |
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 (en) * | 1977-04-30 | 1984-01-05 | Christensen, Inc., 84115 Salt Lake City, Utah | Rotary drill bit |
US4124401A (en) * | 1977-10-21 | 1978-11-07 | General Electric Company | Polycrystalline diamond body |
EP0002947B1 (en) | 1977-12-22 | 1981-03-25 | De Beers Industrial Diamond Division (Proprietary) Limited | Shaping diamond compacts |
ZA781154B (en) * | 1978-02-28 | 1979-09-26 | De Beers Ind Diamond | Abrasive bodies |
JPS5823353B2 (en) * | 1978-05-17 | 1983-05-14 | 住友電気工業株式会社 | Sintered body for cutting tools and its manufacturing method |
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 |
CA1149619A (en) * | 1978-08-26 | 1983-07-12 | Akio Hara | Diamond sintered body and the method for producing the same |
IL60042A (en) * | 1979-05-16 | 1983-05-15 | De Beers Ind Diamond | Abrasive bodies |
CA1193870A (en) * | 1980-08-14 | 1985-09-24 | Peter N. Tomlinson | Abrasive product |
JPS603922B2 (en) * | 1980-09-03 | 1985-01-31 | 日本油脂株式会社 | Cutting tools |
JPS6176534A (en) * | 1984-09-21 | 1986-04-19 | Toa Nenryo Kogyo Kk | Polyethylene film |
ZA862903B (en) * | 1985-04-29 | 1987-11-25 | Smith International | Composite polycrystalline diamond compact |
IE58714B1 (en) * | 1985-06-07 | 1993-11-03 | De Beers Ind Diamond | Thermally stable diamond abrasive compact body |
AU577958B2 (en) * | 1985-08-22 | 1988-10-06 | De Beers Industrial Diamond Division (Proprietary) Limited | Abrasive compact |
JPS63125602A (en) * | 1986-11-12 | 1988-05-28 | Sumitomo Electric Ind Ltd | Hard alloy for tool |
DE3706641A1 (en) * | 1987-03-02 | 1988-09-15 | Hilti Ag | HOLLOW DRILL |
FR2623201B1 (en) * | 1987-11-17 | 1993-04-16 | Combustible Nucleaire | COMPOSITE DIAMOND ABRASIVE PRODUCT, PREPARATION METHOD THEREOF, AND DRILLING OR MACHINING TOOLS PROVIDED THEREWITH |
US4807402A (en) * | 1988-02-12 | 1989-02-28 | General Electric Company | Diamond and cubic boron nitride |
FR2647153B1 (en) * | 1989-05-17 | 1995-12-01 | Combustible Nucleaire | COMPOSITE TOOL COMPRISING A POLYCRYSTALLINE DIAMOND ACTIVE PART AND METHOD FOR MANUFACTURING THE SAME |
AU624521B2 (en) * | 1989-07-07 | 1992-06-11 | De Beers Industrial Diamond Division (Proprietary) Limited | Manufacture of an abrasive body |
US5172778A (en) * | 1991-11-14 | 1992-12-22 | Baker-Hughes, Inc. | Drill bit cutter and method for reducing pressure loading of cutters |
DE29813528U1 (en) | 1998-07-30 | 1998-10-22 | Heinz Gaubatz Modell- und Formenbau GmbH, 63128 Dietzenbach | Cutting device |
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 |
CA2489187C (en) | 2003-12-05 | 2012-08-28 | Smith International, Inc. | 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 (en) * | 2004-07-21 | 2006-02-02 | Ishizuka Kenkyusho:Kk | Super-abrasive grain sintered body throw-away tip |
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 |
GB2454122B (en) | 2005-02-08 | 2009-07-08 | Smith International | Thermally stable polycrystalline diamond cutting elements and bits incorporating the same |
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 |
US8028771B2 (en) | 2007-02-06 | 2011-10-04 | Smith International, Inc. | Polycrystalline diamond constructions having improved thermal stability |
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 |
GB2480219B (en) | 2009-05-06 | 2014-02-12 | Smith International | Cutting elements with re-processed thermally stable polycrystalline diamond cutting layers,bits incorporating the same,and methods of making the same |
WO2010129813A2 (en) | 2009-05-06 | 2010-11-11 | 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 |
US8783389B2 (en) | 2009-06-18 | 2014-07-22 | Smith International, Inc. | Polycrystalline diamond cutting elements with engineered porosity and method for manufacturing such cutting elements |
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 (en) | 2012-01-31 | 2022-11-10 | Kennametal Inc. | Tool head for a modular shank tool, shank tool with such a tool head and manufacturing method for a tool head |
WO2013188688A2 (en) | 2012-06-13 | 2013-12-19 | Varel International Ind., L.P. | Pcd cutters with improved strength and thermal stability |
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 |
US10011000B1 (en) | 2014-10-10 | 2018-07-03 | Us Synthetic Corporation | Leached superabrasive elements and 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 |
US10723626B1 (en) | 2015-05-31 | 2020-07-28 | Us Synthetic Corporation | Leached superabrasive elements and systems, methods and assemblies for processing superabrasive materials |
CN107186633B (en) * | 2017-05-24 | 2023-04-25 | 广东奔朗新材料股份有限公司 | Preparation method of high-performance metal binding agent diamond hob |
US10900291B2 (en) | 2017-09-18 | 2021-01-26 | Us Synthetic Corporation | Polycrystalline diamond elements and systems and methods for fabricating the same |
CN114082956B (en) * | 2021-11-10 | 2024-09-03 | 深圳市海明润超硬材料股份有限公司 | Diamond hot-pressing welding head and preparation method thereof |
Family Cites Families (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE611860C (en) * | 1929-04-23 | 1935-04-08 | Aeg | Process for the production of a hard sintered alloy containing diamond dust and tools made therefrom |
DE627862C (en) * | 1929-09-05 | 1936-03-24 | Aeg | Tool cutting edge and process for their manufacture |
US1895926A (en) * | 1929-09-05 | 1933-01-31 | Gen Electric | Method of forming diamond charged cutting tool bits |
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 (en) * | 1943-04-29 | 1947-12-09 | Improvements in the manufacturing processes of abrasive tools | |
US2476699A (en) * | 1945-11-06 | 1949-07-19 | Norton Co | Diamond abrasive |
US2582231A (en) * | 1949-02-05 | 1952-01-15 | Wheel Trueing Tool Co | Abrasive tool and method of making same |
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 |
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 |
US2947609A (en) * | 1958-01-06 | 1960-08-02 | Gen Electric | Diamond synthesis |
NL129734C (en) * | 1960-07-22 | |||
US3141746A (en) * | 1960-10-03 | 1964-07-21 | Gen Electric | Diamond compact abrasive |
US3136615A (en) * | 1960-10-03 | 1964-06-09 | Gen Electric | Compact of abrasive crystalline material with boron carbide bonding medium |
US3178273A (en) * | 1961-01-07 | 1965-04-13 | Libal Herbert | Method of producing tool surface layers containing diamond particles |
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 (en) * | 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 |
-
1971
- 1971-03-31 NL NL7104326A patent/NL7104326A/xx unknown
- 1971-04-06 ES ES389963A patent/ES389963A1/en not_active Expired
- 1971-04-07 DE DE19712167151 patent/DE2167151C3/en not_active Expired
- 1971-04-07 DE DE19712117056 patent/DE2117056C3/en not_active Expired
- 1971-04-08 BE BE765475A patent/BE765475A/en not_active IP Right Cessation
- 1971-04-08 CH CH519571A patent/CH554209A/en not_active IP Right Cessation
- 1971-04-08 SE SE466771A patent/SE376731B/xx unknown
- 1971-04-08 LU LU62950D patent/LU62950A1/xx unknown
- 1971-04-08 FR FR7112532A patent/FR2089415A5/fr not_active Expired
- 1971-04-08 JP JP2207571A patent/JPS5212126B1/ja active Pending
- 1971-04-19 GB GB2613571A patent/GB1349385A/en not_active Expired
- 1971-05-18 CA CA113,232*7A patent/CA974045A/en not_active Expired
-
1973
- 1973-07-31 ES ES417438A patent/ES417438A1/en not_active Expired
-
1978
- 1978-02-22 JP JP1863078A patent/JPS53134009A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
DE2117056C3 (en) | 1987-07-30 |
GB1349385A (en) | 1974-04-03 |
ES417438A1 (en) | 1976-03-16 |
ES389963A1 (en) | 1974-03-01 |
JPS5212126B1 (en) | 1977-04-05 |
JPS6124360B2 (en) | 1986-06-10 |
CH554209A (en) | 1974-09-30 |
DE2117056A1 (en) | 1971-10-21 |
FR2089415A5 (en) | 1972-01-07 |
NL7104326A (en) | 1971-10-12 |
JPS53134009A (en) | 1978-11-22 |
CA974045A (en) | 1975-09-09 |
DE2167151B1 (en) | 1980-05-08 |
LU62950A1 (en) | 1971-08-26 |
SE376731B (en) | 1975-06-09 |
DE2117056B2 (en) | 1979-05-23 |
DE2167151C3 (en) | 1987-07-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
RE20 | Patent expired |
Owner name: GENERAL ELECTRIC CY Effective date: 19910408 |