SE8005414L - Forfarande for framstellning av belagd tunnplat - Google Patents
Forfarande for framstellning av belagd tunnplatInfo
- Publication number
- SE8005414L SE8005414L SE8005414A SE8005414A SE8005414L SE 8005414 L SE8005414 L SE 8005414L SE 8005414 A SE8005414 A SE 8005414A SE 8005414 A SE8005414 A SE 8005414A SE 8005414 L SE8005414 L SE 8005414L
- Authority
- SE
- Sweden
- Prior art keywords
- plate
- thickness
- chrome
- tunnplate
- coated
- Prior art date
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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/24—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds
- C23C22/30—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds containing also trivalent chromium
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/38—Chromatising
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D13/00—Electrophoretic coating characterised by the process
- C25D13/20—Pretreatment
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/34—Pretreatment of metallic surfaces to be electroplated
- C25D5/36—Pretreatment of metallic surfaces to be electroplated of iron or steel
-
- 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
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12535—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.] with additional, spatially distinct nonmetal component
- Y10T428/12542—More than one such component
-
- 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
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12535—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.] with additional, spatially distinct nonmetal component
- Y10T428/12542—More than one such component
- Y10T428/12549—Adjacent to each other
-
- 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
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12535—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.] with additional, spatially distinct nonmetal component
- Y10T428/12583—Component contains compound of adjacent metal
- Y10T428/1259—Oxide
-
- 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
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12535—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.] with additional, spatially distinct nonmetal component
- Y10T428/12611—Oxide-containing component
-
- 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
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12535—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.] with additional, spatially distinct nonmetal component
- Y10T428/12611—Oxide-containing component
- Y10T428/12618—Plural oxides
-
- 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
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12785—Group IIB metal-base component
- Y10T428/12792—Zn-base component
-
- 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
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12785—Group IIB metal-base component
- Y10T428/12792—Zn-base component
- Y10T428/12799—Next to Fe-base component [e.g., galvanized]
-
- 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
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12806—Refractory [Group IVB, VB, or VIB] metal-base component
- Y10T428/12826—Group VIB metal-base component
- Y10T428/12847—Cr-base component
-
- 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
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12806—Refractory [Group IVB, VB, or VIB] metal-base component
- Y10T428/12826—Group VIB metal-base component
- Y10T428/12847—Cr-base component
- Y10T428/12854—Next to Co-, Fe-, or Ni-base component
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Chemical Treatment Of Metals (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Electroplating Methods And Accessories (AREA)
- Electrochemical Coating By Surface Reaction (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE0/201556A BE884514A (fr) | 1980-07-28 | 1980-07-28 | Tole mince speciale pour carrosserie d'automobile de longue duree, et procede pour sa fabrication |
Publications (2)
Publication Number | Publication Date |
---|---|
SE8005414L true SE8005414L (sv) | 1982-01-29 |
SE441012B SE441012B (sv) | 1985-09-02 |
Family
ID=3843351
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE8005414A SE441012B (sv) | 1980-07-28 | 1980-07-28 | Forfarande for framstellning av stalplat med forbettrad korrosionsbestendighet, serskilt for bilkarosser |
Country Status (7)
Country | Link |
---|---|
US (2) | US4437944A (sv) |
JP (1) | JPS5729597A (sv) |
DE (1) | DE3028587A1 (sv) |
FR (1) | FR2487383A1 (sv) |
GB (1) | GB2080827B (sv) |
NL (1) | NL8004315A (sv) |
SE (1) | SE441012B (sv) |
Families Citing this family (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1161593B (it) * | 1983-03-03 | 1987-03-18 | Lavezzari Impianti Spa | Procedimento per la protezione di laminati piani di acciaio zincato mediante rivestimento elettrolitico multistrato |
IT1163889B (it) * | 1983-08-11 | 1987-04-08 | Lavezzari Impianti Spa | Procedimento perfezionato per la protezione in ambienti particolarmente aggressivi di laminati piani di acciaio mediante rivestimento elettrolitico multistrato |
IT1212859B (it) * | 1983-03-21 | 1989-11-30 | Centro Speriment Metallurg | Laminati piatti di acciaio rivestiti perfezionati |
IT1197609B (it) * | 1983-03-21 | 1988-12-06 | Centro Speriment Metallurg | Procedimento perfezionato per la produzione di nastri di acciaio rivestiti |
JPS62278298A (ja) * | 1985-08-28 | 1987-12-03 | Kawasaki Steel Corp | クロメート処理Zn系めっき鋼板 |
US4861441A (en) * | 1986-08-18 | 1989-08-29 | Nippon Steel Corporation | Method of making a black surface treated steel sheet |
US4885215A (en) * | 1986-10-01 | 1989-12-05 | Kawasaki Steel Corp. | Zn-coated stainless steel welded pipe |
JPS63143292A (ja) * | 1986-12-05 | 1988-06-15 | Nippon Steel Corp | 耐食性に優れた電解クロメート処理亜鉛系メッキ鋼板の製造方法 |
IT1216808B (it) * | 1987-05-13 | 1990-03-14 | Sviluppo Materiali Spa | Processo di elettrodeposizione in continuo di cromo metallico e di ossido di cromo su superfici metalliche |
US4985311A (en) * | 1987-11-26 | 1991-01-15 | Nippon Steel Corporation | Zn-Ni based composite electroplated steel sheet and multi-layer composite plated steel sheet |
FR2640009B1 (fr) * | 1988-12-01 | 1994-09-23 | Nippon Seiko Kk | Element de contact de glissement ou de roulement traite en surface et palier de roulement l'utilisant |
US5645943A (en) * | 1989-08-18 | 1997-07-08 | Takasago Netsugaku Kogyo Kabushiki Kaisha | Electrified object contact component |
US5022968A (en) * | 1990-09-20 | 1991-06-11 | Olin Corporation | Method and composition for depositing a chromium-zinc anti-tarnish coating on copper foil |
US5098796A (en) * | 1989-10-13 | 1992-03-24 | Olin Corporation | Chromium-zinc anti-tarnish coating on copper foil |
US5230932A (en) * | 1989-10-13 | 1993-07-27 | Olin Corporation | Chromium-zinc anti-tarnish coating for copper foil |
US5250363A (en) * | 1989-10-13 | 1993-10-05 | Olin Corporation | Chromium-zinc anti-tarnish coating for copper foil having a dark color |
JP2671612B2 (ja) * | 1991-01-30 | 1997-10-29 | 住友金属工業株式会社 | アルミニウム帯への亜鉛系直接電気めっき方法 |
JP2725477B2 (ja) * | 1991-02-07 | 1998-03-11 | 住友金属工業株式会社 | アルミニウム帯への亜鉛系電気めっき方法 |
EP0500015B1 (en) * | 1991-02-18 | 1998-09-16 | Sumitomo Metal Industries, Ltd. | Use of plated aluminum sheet having improved spot weldability |
GB9211567D0 (en) * | 1992-05-15 | 1992-07-15 | Wednesbury Diecasting And Meta | Improvements relating to electrophoretic coatings |
JP3677939B2 (ja) | 1996-07-30 | 2005-08-03 | 日本精工株式会社 | 表面処理転動部材を有する転動装置 |
US20050211275A1 (en) * | 2004-03-26 | 2005-09-29 | Yar-Ming Wang | Surface-cleaning to remove metal and other contaminants using hydrogen |
DE202006013555U1 (de) * | 2006-09-01 | 2006-12-21 | Zeschky Galvanik Gmbh & Co. Kg | Schwenklager für Automobil-Vorderradaufhängungen |
US8613847B2 (en) * | 2008-11-19 | 2013-12-24 | King Fahd University Of Petroleum And Minerals | Method of applying polyelectrolyte multilayer film for corrosion control |
JP5335595B2 (ja) * | 2009-02-16 | 2013-11-06 | 新日鐵住金ステンレス株式会社 | 加工後耐食性に優れたクロムめっきステンレス鋼板 |
KR101206004B1 (ko) * | 2009-02-16 | 2012-11-29 | 닛폰 스틸 앤드 스미킨 스테인레스 스틸 코포레이션 | 가공 후 내식성이 우수한 크롬 도금 스테인리스 강판 |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3257295A (en) | 1962-01-20 | 1966-06-21 | Yawata Iron & Steel Co | Method of chemically treating metals |
US3827866A (en) * | 1967-03-23 | 1974-08-06 | Nippon Steel Corp | Surface treated steel plate |
JPS4829296B1 (sv) | 1967-04-03 | 1973-09-08 | ||
GB1258021A (sv) | 1969-01-13 | 1971-12-22 | ||
US3816082A (en) | 1969-04-21 | 1974-06-11 | Nat Steel Corp | Method of improving the corrosion resistance of zinc coated ferrous metal substrates and the corrosion resistant substrates thus produced |
DE2031773A1 (de) * | 1969-06-27 | 1971-02-04 | Republic Steel Corp , Cleveland, Ohio (V St A ) | Schutzuberzug auf Metallsubstraten durch elektrolytische Abscheidung von Chrom bestandteilen |
ZA711624B (en) * | 1970-03-24 | 1972-04-26 | Broken Hill Pty Co Ltd | Improved coated metal product and process for coating metal surfaces |
US3954571A (en) | 1970-04-15 | 1976-05-04 | M&T Chemicals Inc. | Wire and strip line electroplating |
US3961993A (en) * | 1971-11-18 | 1976-06-08 | The Empire Plating Company | Coated metal article and method of coating |
US4047977A (en) * | 1972-05-04 | 1977-09-13 | Nippon Steel Corporation | Method of continuous galvanizing steel strip on partial or one side |
US3901771A (en) | 1973-07-11 | 1975-08-26 | Inland Steel Co | One-side electrocoating |
US4048381A (en) | 1975-01-22 | 1977-09-13 | Nippon Kokan Kabushiki Kaisha | Method for manufacturing an electro-galvanized steel sheet excellent in bare corrosion resistance and adaptability to chromating, and product thereof |
JPS5192739A (en) * | 1975-02-13 | 1976-08-14 | Tairyukaseito taisumatsujiseino suguretadenkiburiki | |
US3989604A (en) | 1975-10-15 | 1976-11-02 | National Steel Corporation | Method of producing metal strip having a galvanized coating on one side |
US4216250A (en) * | 1976-05-19 | 1980-08-05 | Nippon Steel Corporation | Method for producing a steel sheet having a zinc coating on one side |
CA1081058A (en) | 1976-11-05 | 1980-07-08 | Robert F. Hunter | Pretreatment of portion of ferrous metal strip with phosphoric acid solution to prevent subsequent galvanization thereon |
JPS5393137A (en) * | 1977-01-28 | 1978-08-15 | Nisshin Steel Co Ltd | Multistage roll coating method of chromate water solution |
JPS53100139A (en) * | 1977-02-14 | 1978-09-01 | Nippon Steel Corp | Surface treating method for alloyed zinc plated steel sheet |
JPS53144834A (en) * | 1977-05-25 | 1978-12-16 | Senju Metal Industry Co | Melting zinc plating method of one side surface of steel plate |
US4171392A (en) * | 1978-11-08 | 1979-10-16 | Inland Steel Company | Process of producing one-side alloyed galvanized steel strip |
-
1980
- 1980-07-28 SE SE8005414A patent/SE441012B/sv not_active IP Right Cessation
- 1980-07-28 DE DE19803028587 patent/DE3028587A1/de not_active Ceased
- 1980-07-28 JP JP10254280A patent/JPS5729597A/ja active Granted
- 1980-07-28 GB GB8024662A patent/GB2080827B/en not_active Expired
- 1980-07-28 FR FR8016615A patent/FR2487383A1/fr active Granted
- 1980-07-28 NL NL8004315A patent/NL8004315A/nl not_active Application Discontinuation
- 1980-12-22 US US06/219,112 patent/US4437944A/en not_active Expired - Fee Related
-
1982
- 1982-03-01 US US06/353,444 patent/US4495008A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
GB2080827A (en) | 1982-02-10 |
JPS5729597A (en) | 1982-02-17 |
US4495008A (en) | 1985-01-22 |
DE3028587A1 (de) | 1982-03-04 |
JPS6354799B2 (sv) | 1988-10-31 |
NL8004315A (nl) | 1982-03-01 |
GB2080827B (en) | 1984-02-08 |
FR2487383A1 (fr) | 1982-01-29 |
US4437944A (en) | 1984-03-20 |
FR2487383B1 (sv) | 1983-12-09 |
SE441012B (sv) | 1985-09-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
NUG | Patent has lapsed |
Ref document number: 8005414-1 Effective date: 19940210 Format of ref document f/p: F |