Patent US4873139A successfully refreshed from Google Patents.
US4873139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion resistant silver and copper surfaces
Assignee: 3M Co
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Filing: 1988-03-29
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Granted: 1989-10-10
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Expires: 2008-03-29
Abstract
Abstract Techniques are described for rendering silver and copper surfaces of various articles resistant to corrosion. The surfaces are contacted with compounds selected from the group consisting of 2-mercaptobenzoxazole and 1-phenyl-1H-tetrazole-5-thiol. Abrasion-resistant coatings are preferably applied to the silver and copper surfaces. The corrosion inhibiting compound may be included in the abrasion-resistant coating.
Inventors
- 👤 David S. Kinosky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:29
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/16; C23F11/161; B; B05; B05D; B05D5/00; B05D5/06; B05D5/067; C09; C09D; C09D5/00; C09D5/08; C09D5/082; C09D5/086; C09D7/00; C09D7/40; C09D7/48; C08; C08K; C08K5/00; C08K5/36; C08K5/37; C08K5/378; Y; Y10; Y10T; Y10T428/00; Y10T428/27; Y10T428/273; Y10T428/31504; Y10T428/31511; Y10T428/31533; Y10T428/31678; Y10T428/31692
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
63 words
An article comprising a plastic film having a layer of silver supported thereon, wherein said silver layer has been contacted with a compound selected from the group consisting of 2-mercaptobenzoxazole and 1-phenyl-1H-tetrazole-5-thiol; wherein said compound is present on said silver layer in an amount of at least about 0.001 gram per square meter; and further comprising a film-forming coating on said silver layer.
Claim 2
Dependent Claim
63 words
An article comprising a plastic film having a layer of silver supported thereon, wherein said silver layer has been contacted with a compound selected from the group consisting of 2-mercaptobenzoxazole and 1-phenyl-1H-tetrazole-5-thiol; wherein said compound is present on said silver layer in an amount of at least about 0.001 gram per square meter; and further comprising a film-forming coating on said silver layer.
Claim 3
Dependent Claim
14 words
An article in accordance with claim 1, wherein said coating comprises a cured resin.
Claim 4
Dependent Claim
48 words
An article having a metallic surface layer selected from the group consisting of silver and copper, said surface bearing a corrosion inhibiting layer comprising a compound selected from the group consisting of 2-mercaptobenzoxazole and 1-phenyl-1H-tetrazole-5-thiol; and further comprising a film-forming hardenable resin layer over said corrosion inhibiting layer.
Claim 5
Dependent Claim
48 words
An article having a metallic surface layer selected from the group consisting of silver and copper, said surface bearing a corrosion inhibiting layer comprising a compound selected from the group consisting of 2-mercaptobenzoxazole and 1-phenyl-1H-tetrazole-5-thiol; and further comprising a film-forming hardenable resin layer over said corrosion inhibiting layer.
Claim 6
Dependent Claim
14 words
An article in accordance with claim 3, wherein said corrosion inhibiting layer is continuous.
Claim 7
Dependent Claim
12 words
An article in accordance with claim 3, wherein said resin is radiation-curable.
Claim 8
Dependent Claim
54 words
An article having a metallic surface comprising silver or copper, wherein said surface has been contacted with a compound consisting essentially of 2-mercaptobenzoxazole; wherein said compound is present on said surface in an amount of at least about 0.001 gram per square meter; and further comprising a film-forming hardenable resin layer over said surface.
Claim 9
Dependent Claim
54 words
An article having a metallic surface comprising silver or copper, wherein said surface has been contacted with a compound consisting essentially of 2-mercaptobenzoxazole; wherein said compound is present on said surface in an amount of at least about 0.001 gram per square meter; and further comprising a film-forming hardenable resin layer over said surface.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-09 | 1993-04-10 | 1993-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-09 | 1997-04-10 | 1997-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-09 | 2001-04-10 | 2001-10-10 | $7700.00 | Window Closed / Lapsed |