US5028759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low emissivity film for a heated windshield
Assignee: PPG Industries Ohio Inc
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Filing: 1989-04-03
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Granted: 1991-07-02
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Expires: 2009-04-03
Abstract
Abstract A multiple-layer, high transmittance, low emissivity coated article which can be subjected to high temperature processing such as bending, annealing, tempering, laminating or glass welding as a result of primer layers comprising metal and metal oxide is disclosed for use as an electroconductive coating for an electrically heatable transparency.
Inventors
- 👤 James J. Finley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:45
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10009; B32B17/10036; B32B17/10165; B32B17/10174; B32B17/1055; B32B17/10761; C; C03; C03C; C03C17/00; C03C17/34; C03C17/36; C03C17/3602; C03C17/3618; C03C17/3644; C03C17/3652; C03C17/3657; C03C17/366; C03C17/3668; C03C17/3673; C03C17/3681; C03C2217/00; C03C2217/70; C03C2217/78
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
161 words
An electrically heatable transparency comprising a transparent sheet, a transparent electroconductive coating on a major surface of the sheet, a first bus bar in contact with the coating along a first edge portion of the sheet, a second bus bar in contact with the coating along a second edge portion of the sheet opposite the first edge portion, an electroconductive extension extending from each end of the second bus bar to the first edge portion along third and fourth edge portions respectively, the extensions being electrically insulated from the coating, wherein the coating comprises: a. a first transparent antireflective metal oxide film deposited on a surface of said substrate; b. a transparent metal-containing primer layer deposited on said antireflective metal oxide film; c. a transparent infrared reflective metallic film deposited on said primer layer; d. a metal-containing primer layer deposited on said infrared reflective metallic film; and e. a second transparent antireflective metal oxide film deposited on said metal-containing primer film.
Claim 2
Dependent Claim
161 words
An electrically heatable transparency comprising a transparent sheet, a transparent electroconductive coating on a major surface of the sheet, a first bus bar in contact with the coating along a first edge portion of the sheet, a second bus bar in contact with the coating along a second edge portion of the sheet opposite the first edge portion, an electroconductive extension extending from each end of the second bus bar to the first edge portion along third and fourth edge portions respectively, the extensions being electrically insulated from the coating, wherein the coating comprises: a. a first transparent antireflective metal oxide film deposited on a surface of said substrate; b. a transparent metal-containing primer layer deposited on said antireflective metal oxide film; c. a transparent infrared reflective metallic film deposited on said primer layer; d. a metal-containing primer layer deposited on said infrared reflective metallic film; and e. a second transparent antireflective metal oxide film deposited on said metal-containing primer film.
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
19 words
An article according to claim 3, wherein the metal oxide comprises an oxide reaction product of zinc and tin.
Claim 6
Dependent Claim
23 words
An article according to claim 1, wherein said metal-containing primer layer comprises a metal selected from the group consisting of titanium and zirconium.
Claim 7
Dependent Claim
20 words
An article according to claim 1, further comprising a protective metal-containing overcoat deposited over said second antireflective metal oxide film.
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) | 1994-07-01 | 1994-12-31 | 1995-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-01 | 1998-12-31 | 1999-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-01 | 2002-12-31 | 2003-07-02 | $7700.00 | Window Closed / Lapsed |