US4707405A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyanamide salts of non-lead metals as corrosion inhibitive pigments in mirror back coatings
Assignee: Lilly Technologies Inc
•
Filing: 1985-01-02
•
Granted: 1987-11-17
•
Expires: 2005-01-02
Abstract
Abstract Compositions of the invention comprise an organic film-forming resin and a cyanamide salt of a non-lead metal. The composition, when applied to a thin metallic film, inhibits degradation of the thin metallic film as compared to the composition without calcium cyanamide. Processes comprising the step of applying a composition of the invention to a thin metallic film and articles comprising a thin metallic film and a layer of a hardened composition of the invention are also disclosed.
Inventors
- 👤 Elaine L. Evans
- 👤 James E. Graham
- 👤 Alan B. Weissberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:23
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/34; C03C17/36; C03C17/3602; C03C17/3647; B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10165; B32B17/10174; C03C17/3657; C03C17/3663; C03C17/38; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
74 words
An article comprising a thin metallic film attached to a glass substrate and a layer of a hardened composition including an organic film-forming resin and a cyanamide salt of a non-lead metal applied to the thin metallic film wherein the composition inhibits degradation of the thin metallic films, the thin metallic film of a metal selected from the group consisting of silver and copper and having a thickness of up to about 1500 Angstroms.
Claim 2
Dependent Claim
74 words
An article comprising a thin metallic film attached to a glass substrate and a layer of a hardened composition including an organic film-forming resin and a cyanamide salt of a non-lead metal applied to the thin metallic film wherein the composition inhibits degradation of the thin metallic films, the thin metallic film of a metal selected from the group consisting of silver and copper and having a thickness of up to about 1500 Angstroms.
Claim 3
Dependent Claim
26 words
The article of claim 1 wherein said metallic film comprises a silver layer adhering to a substrate and a copper layer adhering to said silver layer.
Claim 4
Dependent Claim
28 words
The article of claim 1 wherein the thin metallic film comprises a silver layer adhering to the glass substrate and a copper layer adhering to the silver layer.
Claim 5
Dependent Claim
24 words
The article of claim 1 wherein said cyanamide salt of a non-lead metal is the cyanamide salt of a Group IIA or IIB metal.
Claim 6
Dependent Claim
12 words
The article of claim 4 wherein said cyanamide salt is calcium cyanamide.
Claim 7
Dependent Claim
95 words
A process of inhibiting degradation of a thin metallic film comprising applying a composition including an organic film forming resin and a cyanamide salt of a non-lead metal to the thin metallic film, said thin metallic film of a metal selected from the group consisting of silver and copper and having a thickness of up to about 1500 Angstroms, whereby the applied composition inhibits degradation of the thin metallic film as compared to a thin metallic film coated with the organic film forming resin of the composition without the cyanamide salt of a non-lead metal.
Claim 8
Dependent Claim
95 words
A process of inhibiting degradation of a thin metallic film comprising applying a composition including an organic film forming resin and a cyanamide salt of a non-lead metal to the thin metallic film, said thin metallic film of a metal selected from the group consisting of silver and copper and having a thickness of up to about 1500 Angstroms, whereby the applied composition inhibits degradation of the thin metallic film as compared to a thin metallic film coated with the organic film forming resin of the composition without the cyanamide salt of a non-lead metal.
Claim 9
Dependent Claim
16 words
The process of claim 6 wherein said thin metallic film is attached to a glass surface.
Claim 10
Dependent Claim
24 words
The process of claim 6 wherein said cyanamide salt of a non-lead metal is the cyanamide salt of a Group IIA or IIB metal.
Claim 11
Dependent Claim
12 words
The process of claim 8 wherein said cyanamide salt is calcium cyanamide.
References Cited (Backward Citations)
FR1258659A
Cited
US3878038A
Cited
US4386979A
Cited
US4394129A
Cited
US4357396A
Cited
US4536527A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-11-16 | 1991-05-18 | 1991-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-16 | 1995-05-18 | 1995-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-16 | 1999-05-18 | 1999-11-17 | $7700.00 | Window Closed / Lapsed |