US4898789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low emissivity film for automotive heat load reduction
Assignee: PPG Industries Ohio Inc
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Filing: 1988-04-04
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Granted: 1990-02-06
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Expires: 2008-04-04
Abstract
Abstract A multiple-layer, high transmittance, low emissivity coated article is disclosed comprising at least two infrared reflective metal layers alternatingly combined with at least three metal oxide antireflective layers to produce a coating with superior low emissivity and low visible reflectance, especially for use to reduce heat load in automobiles.
Inventors
- 👤 James J. Finley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:47
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/34; C03C17/36; C03C17/3602; C03C17/3618; B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10009; B32B17/10036; B32B17/10165; B32B17/10174; C03C17/3639; C03C17/3644; C03C17/3649; C03C17/3652; C03C17/3657; C03C17/366; C03C17/3681; C23; C23C; C23C14/00; C23C14/06; C23C14/08; C23C14/086; G; G02; G02B; G02B1/00; G02B1/10; G02B1/11; G02B1/113; G02B1/115; G02B1/116; G02B5/00; G02B5/20; G02B5/208; G02B5/26; C03C2217/00; C03C2217/70; C03C2217/78; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12542; Y10T428/12549; Y10T428/12611; Y10T428/12618; Y10T428/12771; Y10T428/12806; Y10T428/12861; Y10T428/12896
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
115 words
A high transmittance, low emissivity article comprising: a. a transparent nonmetallic substrate; b. a first transparent antireflective metal oxide film deposited on a surface of said substrate; c. a first transparent infrared reflective metallic film deposited on said antireflective metal oxide film; d. a transparent metal-containing primer film deposited on said infrared reflective metallic film; e. a second transparent antireflective metal oxide film deposited on said primer film; f. a second transparent infrared reflective metallic film deposited on said second transparent antireflective metal oxide film; g. a second transparent metal-containing primer film deposited on said second infrared reflective metallic film; and h. a third transparent antireflective metal oxide film deposited on said second primer film.
Claim 2
Dependent Claim
115 words
A high transmittance, low emissivity article comprising: a. a transparent nonmetallic substrate; b. a first transparent antireflective metal oxide film deposited on a surface of said substrate; c. a first transparent infrared reflective metallic film deposited on said antireflective metal oxide film; d. a transparent metal-containing primer film deposited on said infrared reflective metallic film; e. a second transparent antireflective metal oxide film deposited on said primer film; f. a second transparent infrared reflective metallic film deposited on said second transparent antireflective metal oxide film; g. a second transparent metal-containing primer film deposited on said second infrared reflective metallic film; and h. a third transparent antireflective metal oxide film deposited on said second 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 films are silver.
Claim 5
Dependent Claim
21 words
An article according to claim 3, wherein the antireflective metal oxide films comprise an oxide reaction product of zinc and tin.
Claim 6
Dependent Claim
12 words
An article according to claim 1, wherein said primer films comprise titanium.
Claim 7
Dependent Claim
28 words
An article according to claim 1, further comprising an additional primer layer between said first transparent antireflective metal oxide film and said first transparent infrared reflective metallic film.
Claim 8
Dependent Claim
13 words
An article according to claim 6, wherein said additional primer layer comprises titanium.
Claim 9
Dependent Claim
29 words
An article according to claim 7, further comprising a second additional primer layer between said second transparent antireflective metal oxide film and said second transparent infrared reflective metal film.
Claim 10
Dependent Claim
12 words
An article according to claim 8, wherein all primer layers comprise titanium.
Claim 11
Dependent Claim
21 words
An article according to claim 1, further comprising a protective metal-containing overcoat deposited over said third transparent antireflective metal oxide film.
Claim 12
Dependent Claim
18 words
An article according to claim 1, wherein said substrate is an automotive windshield, side lite or back lite.
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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) | 1993-02-05 | 1993-08-07 | 1994-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-05 | 1997-08-07 | 1998-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-05 | 2001-08-07 | 2002-02-06 | $7700.00 | Window Closed / Lapsed |