US4692389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stainless steel overcoat for sputtered films
Assignee: PPG Industries Ohio Inc
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Filing: 1986-03-17
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Granted: 1987-09-08
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Expires: 2006-03-17
Abstract
Abstract A method is disclosed for improving the stability and durability of sputtered metal films such as silver and copper by means of depositing a protective overcoat of a metal such as stainless steel on the exposed surface of the film.
Inventors
- 👤 F. Howard Gillery
- 👤 Russell C. Criss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:02
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/34; C03C17/36; C03C17/3602; C03C17/3607; C03C17/3613; C03C17/3642; C03C17/3652; C03C17/3689; C23; C23C; C23C14/00; C23C14/06; C23C14/14; C23C14/16; C23C14/18; C03C2217/00; C03C2217/70; C03C2217/78; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12542; Y10T428/12597
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
46 words
An article of manufacture comprising: a. a transparent nonmetallic substrate; b. a transparent coating of a metal selected from the group consisting of silver, copper, gold, platinum, palladium and mixtures thereof; and c. a transparent protective overcoat comprising a metal having a dense oxide surface layer.
Claim 2
Dependent Claim
46 words
An article of manufacture comprising: a. a transparent nonmetallic substrate; b. a transparent coating of a metal selected from the group consisting of silver, copper, gold, platinum, palladium and mixtures thereof; and c. a transparent protective overcoat comprising a metal having a dense oxide surface layer.
Claim 3
Dependent Claim
59 words
An article of manufacture comprising: a. a transparent nonmetallic substrate; b. a transparent primer layer which bonds oxidatively to the substrate surface; c. a transparent coating of a metal selected from the group consisting of silver, copper, gold, platinum, palladium and mixtures thereof; and d. a transparent protective overcoat of a metal which forms a dense oxide surface layer.
Claim 4
Dependent Claim
59 words
An article of manufacture comprising: a. a transparent nonmetallic substrate; b. a transparent primer layer which bonds oxidatively to the substrate surface; c. a transparent coating of a metal selected from the group consisting of silver, copper, gold, platinum, palladium and mixtures thereof; and d. a transparent protective overcoat of a metal which forms a dense oxide surface layer.
Claim 5
Dependent Claim
37 words
An article according to claim 2, wherein a. the substrate is glass; and b. the primer layer and overcoat are selected from the group consisting of stainless steel, titanium, vanadium, chromium, aluminum, tin, tantalum and nickel alloys.
Claim 6
Dependent Claim
30 words
An article according to claim 3, wherein the primer layer and overcoat are stainless steel, and the coating is selected from the group consisting of silver, copper and mixtures thereof.
Claim 7
Dependent Claim
21 words
An article according to claim 4, wherein the coating comprises a first layer of silver and a second layer of copper.
Claim 8
Dependent Claim
26 words
An article according to claim 5, wherein the stainless steel, silver and copper layers are of relative thicknesses which produce a low reflectance, pinkish colored article.
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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) | 1990-09-07 | 1991-03-09 | 1991-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-07 | 1995-03-09 | 1995-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-07 | 1999-03-09 | 1999-09-08 | $7700.00 | Window Closed / Lapsed |