ES2048283T3 - Proceso y equipo para la formacion de microfiguras sobre la superficie de rodillo, laminas de metal para el prensado obtenidas por el rodillo y metodos para la preparacion del mismo. - Google Patents
Proceso y equipo para la formacion de microfiguras sobre la superficie de rodillo, laminas de metal para el prensado obtenidas por el rodillo y metodos para la preparacion del mismo.Info
- Publication number
- ES2048283T3 ES2048283T3 ES89303908T ES89303908T ES2048283T3 ES 2048283 T3 ES2048283 T3 ES 2048283T3 ES 89303908 T ES89303908 T ES 89303908T ES 89303908 T ES89303908 T ES 89303908T ES 2048283 T3 ES2048283 T3 ES 2048283T3
- Authority
- ES
- Spain
- Prior art keywords
- roller
- preparation
- equipment
- microfigures
- formation
- 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 - Lifetime
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F4/00—Processes for removing metallic material from surfaces, not provided for in group C23F1/00 or C23F3/00
- C23F4/04—Processes for removing metallic material from surfaces, not provided for in group C23F1/00 or C23F3/00 by physical dissolution
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C1/00—Forme preparation
- B41C1/02—Engraving; Heads therefor
- B41C1/04—Engraving; Heads therefor using heads controlled by an electric information signal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/40—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling foils which present special problems, e.g. because of thinness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/005—Rolls with a roughened or textured surface; Methods for making same
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/08—Devices involving relative movement between laser beam and workpiece
- B23K26/0823—Devices involving rotation of the workpiece
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/18—Working by laser beam, e.g. welding, cutting or boring using absorbing layers on the workpiece, e.g. for marking or protecting purposes
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/02—Local etching
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F2201/00—Mechanical deformation of paper or cardboard without removing material
- B31F2201/07—Embossing
- B31F2201/0707—Embossing by tools working continuously
- B31F2201/0715—The tools being rollers
- B31F2201/0717—Methods and means for forming the embossments
-
- 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
- Y10T428/12—All metal or with adjacent metals
- Y10T428/1241—Nonplanar uniform thickness or nonlinear uniform diameter [e.g., L-shape]
-
- 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
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12993—Surface feature [e.g., rough, mirror]
-
- 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
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24628—Nonplanar uniform thickness material
-
- 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
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24628—Nonplanar uniform thickness material
- Y10T428/24669—Aligned or parallel nonplanarities
-
- 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
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24628—Nonplanar uniform thickness material
- Y10T428/24736—Ornamental design or indicia
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
- Laser Beam Processing (AREA)
- ing And Chemical Polishing (AREA)
- Metal Rolling (AREA)
- Chemically Coating (AREA)
Abstract
SE PREVEE UN PROCESO Y UN EQUIPO PARA MICROPATIONES FORMADOS SOBRE LA SUPERFICIE DE UN CILINDRO QUE GIRA, Y UNA HOJA DELGADA METALICA Y SU PREPARACION PARA TRANSMITIR EL MICROPATION EN LA SUPERFICIE DEL CILINDRO, LA HOJA METALICA DELGADA RUEDA POR EL CILINDRO Y ES USADO COMO UN PANEL - COCHE SUPERIOR EN ABILIDAD DE TRABAJO Y AGUDIZADO DE REFLEJO.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9829688 | 1988-04-22 | ||
JP15949388 | 1988-06-29 | ||
JP22045188 | 1988-09-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
ES2048283T3 true ES2048283T3 (es) | 1994-03-16 |
Family
ID=27308621
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES89303908T Expired - Lifetime ES2048283T3 (es) | 1988-04-22 | 1989-04-20 | Proceso y equipo para la formacion de microfiguras sobre la superficie de rodillo, laminas de metal para el prensado obtenidas por el rodillo y metodos para la preparacion del mismo. |
Country Status (8)
Country | Link |
---|---|
US (1) | US4959275A (es) |
EP (1) | EP0338816B1 (es) |
JP (1) | JPH0651913B2 (es) |
KR (1) | KR920000231B1 (es) |
BR (1) | BR8901935A (es) |
CA (1) | CA1321625C (es) |
DE (1) | DE68910866T2 (es) |
ES (1) | ES2048283T3 (es) |
Families Citing this family (88)
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AT393979B (de) * | 1989-11-07 | 1992-01-10 | Kufstein Schablonentech Gmbh | Vorrichtung zum bearbeiten von hohlzylindern mittels eines lasers |
JPH0747170B2 (ja) * | 1989-12-29 | 1995-05-24 | 新日本製鐵株式会社 | 鋼板圧延用ダルロールの表面に凹凸パターンを形成する方法 |
US5025547A (en) * | 1990-05-07 | 1991-06-25 | Aluminum Company Of America | Method of providing textures on material by rolling |
US5106455A (en) * | 1991-01-28 | 1992-04-21 | Sarcos Group | Method and apparatus for fabrication of micro-structures using non-planar, exposure beam lithography |
JP2961159B2 (ja) * | 1991-07-30 | 1999-10-12 | 新日本製鐵株式会社 | 圧延ロールの表面加工方法 |
CA2095228C (en) * | 1991-09-03 | 1997-01-14 | Takaharu Kawamoto | Steel strip having excellent painting sharpness and press moldability and method for producing rolling dull roll |
US6027863A (en) * | 1991-09-05 | 2000-02-22 | Intratherapeutics, Inc. | Method for manufacturing a tubular medical device |
US6107004A (en) * | 1991-09-05 | 2000-08-22 | Intra Therapeutics, Inc. | Method for making a tubular stent for use in medical applications |
CA2380683C (en) * | 1991-10-28 | 2006-08-08 | Advanced Cardiovascular Systems, Inc. | Expandable stents and method for making same |
JPH05177369A (ja) * | 1992-01-06 | 1993-07-20 | Kawasaki Steel Corp | 圧延用金属ロール表面への模様付与方法 |
ES2075512T3 (es) * | 1992-03-27 | 1995-10-01 | Schablonentechnik Kufstein Ag | Dispositivo para el mecanizado de cilindros huecos de paredes finas mediante un rayo laser. |
JPH06170564A (ja) * | 1992-12-02 | 1994-06-21 | Nippon Steel Corp | インラインレーザーダル加工装置 |
US5456955A (en) * | 1992-12-11 | 1995-10-10 | Illuminated Display Division Of Bell Industries, Inc. | Method and apparatus for forming an illuminated display |
US5537851A (en) * | 1993-01-05 | 1996-07-23 | Aluminum Company Of America | Sheet product produced by massive reduction in last stand of cold rolling process |
US5723843A (en) * | 1993-01-28 | 1998-03-03 | Illuminated Display Division Of Bell Industries, Inc. | Method of forming and balancing an illuminated display panel |
US5429177A (en) * | 1993-07-09 | 1995-07-04 | Sierra Regenators, Inc. | Foil regenerator |
GB9403682D0 (en) * | 1994-02-25 | 1994-04-13 | Univ Edinburgh | Direct printing of etch masks under computer control |
CA2119938C (en) * | 1994-03-25 | 1999-11-09 | Andre F. Vigeant | Enhanced protective metallic coating weights for steel sheet |
US5508119A (en) * | 1994-09-07 | 1996-04-16 | Aluminum Company Of America | Enhanced work roll surface texture for cold and hot rolling of aluminum and its alloys |
DE19544502C1 (de) * | 1995-11-29 | 1997-05-15 | Baasel Scheel Lasergraphics Gm | Lasergravuranlage |
US5981084A (en) * | 1996-03-20 | 1999-11-09 | Metal Technology, Inc. | Electrolytic process for cleaning electrically conducting surfaces and product thereof |
US6832547B2 (en) | 1996-10-16 | 2004-12-21 | Fort James Corporation | Embossing system including sleeved rolls |
US5817243A (en) * | 1996-10-30 | 1998-10-06 | Shaffer; Wayne K. | Method for applying decorative contrast designs to automotive and motorcycle parts using lasers |
KR19980061912A (ko) * | 1996-12-31 | 1998-10-07 | 서상기 | 무늬 각인용 롤(roll)을 제조하는 방법 및 이를 수행하기 위한 장치 |
US7753950B2 (en) | 1997-08-13 | 2010-07-13 | Advanced Cardiovascular Systems, Inc. | Stent and catheter assembly and method for treating bifurcations |
US6549309B1 (en) | 1998-02-10 | 2003-04-15 | Illinois Tool Works Inc. | Holography apparatus, method and product |
US6063200A (en) * | 1998-02-10 | 2000-05-16 | Sarcos L.C. | Three-dimensional micro fabrication device for filamentary substrates |
US6171334B1 (en) | 1998-06-17 | 2001-01-09 | Advanced Cardiovascular Systems, Inc. | Expandable stent and method of use |
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US6261702B1 (en) * | 1999-05-21 | 2001-07-17 | J&L Specialty Steel, Inc. | Embossed rolled steel and embossing roll and method for making the same |
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US6436132B1 (en) | 2000-03-30 | 2002-08-20 | Advanced Cardiovascular Systems, Inc. | Composite intraluminal prostheses |
US6388780B1 (en) | 2000-05-11 | 2002-05-14 | Illinois Tool Works Inc. | Hologram production technique |
US6652579B1 (en) | 2000-06-22 | 2003-11-25 | Advanced Cardiovascular Systems, Inc. | Radiopaque stent |
US6620332B2 (en) * | 2001-01-25 | 2003-09-16 | Tecomet, Inc. | Method for making a mesh-and-plate surgical implant |
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US6599322B1 (en) | 2001-01-25 | 2003-07-29 | Tecomet, Inc. | Method for producing undercut micro recesses in a surface, a surgical implant made thereby, and method for fixing an implant to bone |
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CN104551408B (zh) * | 2014-12-23 | 2016-04-13 | 中国科学院力学研究所 | 多束光合成聚焦的辊类表面毛化激光加工系统及加工方法 |
CN104625397B (zh) * | 2014-12-23 | 2017-03-01 | 中国科学院力学研究所 | 多束光合成聚焦控制系统及控制方法 |
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CN105562933B (zh) * | 2016-02-22 | 2017-10-31 | 中国科学院力学研究所 | 一种提高圆周无规则毛化微坑均匀性的控制系统及方法 |
CN107931353B (zh) * | 2016-10-12 | 2019-09-17 | 宝钢特钢有限公司 | 热轧双相不锈钢板表面压力加工方法及其应用 |
KR102075221B1 (ko) * | 2017-12-26 | 2020-02-07 | 주식회사 포스코 | 롤표면 패턴형성장치 및 금속판 제조방법 |
CN109365993B (zh) * | 2018-11-27 | 2020-11-20 | 江苏大学 | 一种轧辊激光毛化加工设备及其加工方法 |
KR102153240B1 (ko) * | 2019-11-29 | 2020-09-07 | 김찬삼 | 레이저 롤 패터닝 장치 및 이를 이용한 패터닝 방법 |
DE102020208777A1 (de) | 2020-07-14 | 2022-01-20 | Thyssenkrupp Steel Europe Ag | Dressiertes Stahlblech, Dressierwalze sowie Verfahren zur Herstellung eines dressierten Stahlblechs |
DE102021200226A1 (de) | 2021-01-12 | 2022-07-14 | Thyssenkrupp Steel Europe Ag | Verfahren zur Herstellung einer texturierten Dressierwalze |
DE102022113809A1 (de) | 2022-06-01 | 2023-12-07 | Thyssenkrupp Steel Europe Ag | Metallflachprodukt und Bauteil daraus |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2684291A (en) * | 1951-04-30 | 1954-07-20 | Sharon Steel Corp | Process for producing embossed designs on hard surfaces rolls |
US2854336A (en) * | 1955-03-07 | 1958-09-30 | Youngstown Arc Engraving Compa | Method of forming a two-level photoengraved embossing plate or mold |
US3048512A (en) * | 1957-06-27 | 1962-08-07 | Modern Engraving And Machine C | Method of making matched embossing rolls |
DD118673A2 (es) * | 1975-04-02 | 1976-03-12 | ||
DE2706947C3 (de) * | 1977-02-18 | 1981-11-19 | Standex International Gmbh, 4150 Krefeld | Verfahren und Druckwalzeneinrichtung zur Herstellung von Prägegravuren auf großformatigen Preßplatten für Kunststoffplattenpressen durch Auftragen einer Ätzreserve |
LU79208A1 (fr) * | 1978-03-09 | 1979-10-29 | Centre Rech Metallurgique | Procede pour ameliorer la qualite des toles en acier |
US4321105A (en) * | 1978-07-03 | 1982-03-23 | Standex International Corporation | Method of producing embossed designs on surfaces |
FR2476524A1 (fr) * | 1980-02-27 | 1981-08-28 | Sumitomo Metal Ind | Procede pour travailler la surface d'un cylindre de laminage a froid |
DE3113855A1 (de) * | 1981-04-06 | 1982-10-21 | Fritz Wittig Herstellung gedruckter Schaltungen, 8000 München | Verfahren zur herstellung von leiterplatten |
US4504354A (en) * | 1982-08-23 | 1985-03-12 | Gravure Research Institute, Inc. | Method and apparatus for forming gravure cells in a gravure cylinder |
SU1084091A1 (ru) * | 1983-02-17 | 1984-04-07 | Запорожский Ордена "Знак Почета" Машиностроительный Институт Им.В.Я.Чубаря | Способ обработки поверхности листа |
EP0308512B1 (en) * | 1987-02-24 | 1994-06-22 | Nippon Steel Corporation | Apparatus for dull finish of roll with pulse laser |
-
1989
- 1989-04-04 JP JP1083894A patent/JPH0651913B2/ja not_active Expired - Fee Related
- 1989-04-17 US US07/339,123 patent/US4959275A/en not_active Expired - Fee Related
- 1989-04-20 DE DE89303908T patent/DE68910866T2/de not_active Expired - Fee Related
- 1989-04-20 EP EP89303908A patent/EP0338816B1/en not_active Expired - Lifetime
- 1989-04-20 ES ES89303908T patent/ES2048283T3/es not_active Expired - Lifetime
- 1989-04-21 CA CA000597402A patent/CA1321625C/en not_active Expired - Fee Related
- 1989-04-22 KR KR1019890005329A patent/KR920000231B1/ko not_active IP Right Cessation
- 1989-04-24 BR BR898901935A patent/BR8901935A/pt not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
DE68910866D1 (de) | 1994-01-05 |
JPH0651913B2 (ja) | 1994-07-06 |
EP0338816A2 (en) | 1989-10-25 |
KR890016210A (ko) | 1989-11-28 |
JPH02175882A (ja) | 1990-07-09 |
KR920000231B1 (ko) | 1992-01-10 |
US4959275A (en) | 1990-09-25 |
BR8901935A (pt) | 1990-04-10 |
EP0338816A3 (en) | 1990-11-14 |
DE68910866T2 (de) | 1994-03-17 |
CA1321625C (en) | 1993-08-24 |
EP0338816B1 (en) | 1993-11-24 |
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