US4048372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating of cadmium stannate films onto plastic substrates
Assignee: Wyeth Holdings LLC
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Filing: 1976-02-27
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Granted: 1977-09-13
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Expires: 1996-02-27
Abstract
Abstract Light transmissive, electrically conductive cadmium stannate films on plastic substrates are greatly improved with respect to their adherence to the substrate if the film is deposited on a substrate which has been precoated with a metal oxide, such as silicon dioxide or titanium dioxide.
Inventors
- 👤 Hiei Ando
- 👤 Gottfried Haacke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:07
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/06; C23C14/10; C08; C08J; C08J7/00; C08J7/04; C08J7/043; C08J7/044; C08J7/06; C23C14/08; C23C14/083; C23C14/086; H; H01; H01B; H01B1/00; H01B1/06; H01B1/08; H01G; H01G9/00; H01G9/20; H01M; H01M14/00; H01M14/005; H05; H05K; H05K3/00; H05K3/38; H05K3/388; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T428/31855
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
52 words
In the process for coating a polymeric substrate with a light transmissive, electrically conductive film of cadmium stannate, the improvement which comprises first coating the substrate with a film of a metal oxide, selected from silicon monoxide, silicon dioxide, titanium dioxide, tantalum oxide, antimony oxide, magnesium oxide, chromium oxide and vanadium oxide.
Claim 2
Dependent Claim
52 words
In the process for coating a polymeric substrate with a light transmissive, electrically conductive film of cadmium stannate, the improvement which comprises first coating the substrate with a film of a metal oxide, selected from silicon monoxide, silicon dioxide, titanium dioxide, tantalum oxide, antimony oxide, magnesium oxide, chromium oxide and vanadium oxide.
Claim 3
Dependent Claim
14 words
The process of claim 1 wherein the polymeric substrate is a polycarbonate or polymethylmethacrylate.
Claim 4
Dependent Claim
21 words
The process of claim 2 wherein the metal oxide is selected from silicon monoxide, silicon dioxide, titanium dioxide and tantalum oxide.
Claim 5
Dependent Claim
15 words
The process of claim 3 wherein the metal oxide interlayer is deposited by vacuum evaporation.
Claim 6
Dependent Claim
17 words
The process of claim 3 wherein the metal oxide interlayer is deposited by low temperature chemical deposition.
Claim 7
Dependent Claim
48 words
An electrically conductive, light transmissive device consisting of an electrically conductive, light transmissive film of cadmium stannate coated on a polymeric substrate pre-coated with a film of metal oxide selected from silicon oxide, dilicon silicon, titanium dioxide, tantalum oxide, antimony oxide, magnesium oxide, chromium oxide and vanadium oxide.
Claim 8
Dependent Claim
48 words
An electrically conductive, light transmissive device consisting of an electrically conductive, light transmissive film of cadmium stannate coated on a polymeric substrate pre-coated with a film of metal oxide selected from silicon oxide, dilicon silicon, titanium dioxide, tantalum oxide, antimony oxide, magnesium oxide, chromium oxide and vanadium oxide.
Claim 9
Dependent Claim
23 words
The device of claim 6 in which the metal oxide film is selected from silicon monoxide, silicon dioxide, titanium dioxide and tantalum oxide.
Claim 10
Dependent Claim
14 words
The device of claim 6 wherein the polymeric substrate is a polycarbonate or polymethylmethacrylate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |