US4786563A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective coating for low emissivity coated articles
Assignee: PPG Industries Ohio Inc
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Filing: 1987-09-14
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Granted: 1988-11-22
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Expires: 2007-09-14
Abstract
Abstract A multiple layer high transmittance, low emissivity coated article is disclosed with improved chemical resistance as a result of a protective overcoat of titanium oxide.
Inventors
- 👤 F. Howard Gillery
- 👤 Russell C. Criss
- 👤 James J. Finley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:07
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/34; C03C17/36; C03C17/3602; C03C17/3618; C03C17/3644; C03C17/3652; C03C17/3657; C03C17/366; C03C17/3681; C03C2217/00; C03C2217/70; C03C2217/78; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12597; Y10T428/12604; Y10T428/12611; Y10T428/12618
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
105 words
A high transmittance, low emissivity article comprising: a. a transparent nonmetallic substrate; b. a first transparent anti-reflective film comprising a metal oxide deposited on a surface of said substrate; c. a transparent infrared reflective metallic film deposited after said first anti-reflective metal oxide film; d. a second transparent anti-reflective film comprising a metal oxide deposited after said infrared reflective metallic film; and e. a protective metal oxide overcoat deposited after said second anti-reflective metal oxide film comprising a metal oxide having a greater durability than said anti-reflective metal oxide at a thickness which does not significantly affect the reflectance and transmittance of the coated article.
Claim 2
Dependent Claim
105 words
A high transmittance, low emissivity article comprising: a. a transparent nonmetallic substrate; b. a first transparent anti-reflective film comprising a metal oxide deposited on a surface of said substrate; c. a transparent infrared reflective metallic film deposited after said first anti-reflective metal oxide film; d. a second transparent anti-reflective film comprising a metal oxide deposited after said infrared reflective metallic film; and e. a protective metal oxide overcoat deposited after said second anti-reflective metal oxide film comprising a metal oxide having a greater durability than said anti-reflective metal oxide at a thickness which does not significantly affect the reflectance and transmittance of the coated article.
Claim 3
Dependent Claim
11 words
An article according to claim 1, wherein the substrate is glass.
Claim 4
Dependent Claim
13 words
An article according to claim 2, wherein the reflective metallic film is silver.
Claim 5
Dependent Claim
26 words
An article according to claim 3, wherein the first and second transparent anti-reflective films comprise an oxide reaction product of an alloy comprising zinc and tin.
Claim 6
Dependent Claim
22 words
An article according to claim 4, wherein the transparent film comprising an oxide reaction product of a metal alloy comprises zinc stannate.
Claim 7
Dependent Claim
36 words
An article according to claim 1, which further comprises a primer film deposited between the reflective metallic film and transparent metal oxide anti-reflective film selected from the group consisting of copper, indium and the oxides thereof.
Claim 8
Dependent Claim
12 words
An article according to claim 6, wherein the primer film comprises copper.
Claim 9
Dependent Claim
15 words
An article according to claim 1, wherein the protective metal oxide overcoat comprises titanium oxide.
References Cited (Backward Citations)
US4716086A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-22 | 1992-05-23 | 1992-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-22 | 1996-05-23 | 1996-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-22 | 2000-05-23 | 2000-11-22 | $7700.00 | Window Closed / Lapsed |