US4716086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective overcoat for low emissivity coated article
Assignee: PPG Industries Ohio Inc
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Filing: 1985-12-23
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Granted: 1987-12-29
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Expires: 2005-12-23
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
2026-11-01 09:27
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/34; C03C17/36; C03C17/3602; C03C17/3618; C23; C23C; C23C14/00; C23C14/22; C23C14/34; C03C17/3613; C03C17/3644; C03C17/3652; C03C17/3657; C03C17/366; C03C17/3681; C23C14/06; C23C14/08; C23C14/14; C23C14/18; G; G02; G02B; G02B1/00; G02B1/10; G02B1/11; G02B1/113; G02B1/115; G02B1/116; G02B1/14; G02B5/00; G02B5/20; G02B5/208; C03C2217/00; C03C2217/70; C03C2217/73; 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: 11
Claim 1
Independent Claim
96 words
A high transmittance, low emissivity article comprising: a. a transparent nonmetallic substrate; b. a first transparent antireflective film comprising a metal oxide deposited on a surface of said substrate; c. a transparent infrared reflective metallic film deposited after said first antireflective metal oxide film; d. a second transparent antireflective film comprising a metal oxide deposited after said infrared reflective metallic film; and e. a protective overcoat about 10 to 50 Angstroms thick deposited after said second antireflective metal oxide film comprising a metal oxide having greater durability than said antireflective metal oxide at the same thickness.
Claim 2
Dependent Claim
96 words
A high transmittance, low emissivity article comprising: a. a transparent nonmetallic substrate; b. a first transparent antireflective film comprising a metal oxide deposited on a surface of said substrate; c. a transparent infrared reflective metallic film deposited after said first antireflective metal oxide film; d. a second transparent antireflective film comprising a metal oxide deposited after said infrared reflective metallic film; and e. a protective overcoat about 10 to 50 Angstroms thick deposited after said second antireflective metal oxide film comprising a metal oxide having greater durability than said antireflective metal oxide at the same thickness.
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
24 words
An article according to claim 3, wherein the anti-reflective metal oxide film comprises an oxide reaction product of an alloy comprising zinc and tin.
Claim 6
Dependent Claim
24 words
An article according to claim 4, wherein the anti-reflective metal oxide 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.
Claim 10
Dependent Claim
20 words
An article according to claim 8, wherein the thickness of the titanium oxide overcoat is about 10 to 20 Angstroms.
Claim 11
Dependent Claim
20 words
An article according to claim 9, wherein the thickness of the titanium oxide overcoat is about 15 to 20 Angstroms.
References Cited (Backward Citations)
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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) | 1990-12-28 | 1991-06-29 | 1991-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-28 | 1995-06-29 | 1995-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-28 | 1999-06-29 | 1999-12-29 | $7700.00 | Window Closed / Lapsed |