US4844985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically heated transparent glass article and method of making
Assignee: Automotive Components Holdings LLC
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Filing: 1988-11-02
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Granted: 1989-07-04
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Expires: 2008-11-02
Abstract
Abstract In a transparent glass article comprising an electrically conductive, transparent, metal-based coating on a glass substrate and polyvinyl butyral material (PVB) bonded thereto, adhesion between the coating and the PVB is improved by a thin chromium-based film on the metal-based coating interfacing with the PVB. Adhesion is particularly improved in its resistance to exposure to UV radiation. In an electrically heated windshield application, the adhesion is improved by chromium-based film (24) between the metal-based coating (22) on a first glass template (12) and a PVB interlayer (26) mediate the first glass template and a second glass template (28). The glass article is produced according to a method aspect of the invention.
Inventors
- 👤 Eugene P. Pharms
- 👤 Charles J. Amberger
- 👤 Ronald R. Hymore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:16
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/84; H05B3/86; B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10009; B32B17/10036; B32B17/10165; B32B17/10174; B32B17/1055; B32B17/10761; H05B2203/00; H05B2203/013; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
37 words
A transparent glass article comprising: a glass substrate; an electrically conductive, transparent, metal-based coating on a surface of said glass substrate; a chromium-based film over the metal-based coating; and polyvinyl butyral material bonded to said chromium-based film.
Claim 2
Dependent Claim
37 words
A transparent glass article comprising: a glass substrate; an electrically conductive, transparent, metal-based coating on a surface of said glass substrate; a chromium-based film over the metal-based coating; and polyvinyl butyral material bonded to said chromium-based film.
Claim 3
Dependent Claim
16 words
The transparent glass article of claim 1 wherein said chromium-based film consists essentially of chromium oxide.
Claim 4
Dependent Claim
18 words
The transparent glass article of claim 1 wherein said chromium-based film consists essentially of chromium oxide and chromium.
Claim 5
Dependent Claim
45 words
The transparent glass article of claim 1 wherein said metal-based coating comprises a first zinc oxide film immediately adjacent said glass substrate, a silver film over said first zinc oxide film and a second zinc oxide film mediate said silver film and said chromium-based film.
Claim 6
Dependent Claim
21 words
The transparent glass article of claim 1 wherein said chromium-based film is from about 25 angstroms to about 100 angstroms thick.
Claim 7
Dependent Claim
19 words
The transparent glass article of claim 1 wherein said article is an electrically heated windshield of a motor vehicle.
Claim 8
Dependent Claim
122 words
An electrically heated windshield for a motor vehicle, which windshield comprises: a first glass template having an outboard surface and an oppositely facing inboard surface; an electrically conductive, transparent, metal-based coating on said inboard surface of said first glass template, said metal-based coating comprising a first zinc oxide film immediately adjacent said inboard surface, a silver film over said first zinc oxide film and a second zinc oxide film over said silver film; a chromium-based film over said second zinc oxide film; a layer of polyvinyl butyral material substantially coextensive with said first glass template and having an outboard surface bonded to said chromium-based film; and a second glass template bonded to an inboard surface of said layer of polyvinyl butyral material.
Claim 9
Dependent Claim
122 words
An electrically heated windshield for a motor vehicle, which windshield comprises: a first glass template having an outboard surface and an oppositely facing inboard surface; an electrically conductive, transparent, metal-based coating on said inboard surface of said first glass template, said metal-based coating comprising a first zinc oxide film immediately adjacent said inboard surface, a silver film over said first zinc oxide film and a second zinc oxide film over said silver film; a chromium-based film over said second zinc oxide film; a layer of polyvinyl butyral material substantially coextensive with said first glass template and having an outboard surface bonded to said chromium-based film; and a second glass template bonded to an inboard surface of said layer of polyvinyl butyral material.
Claim 10
Dependent Claim
16 words
The electrically heated windshield of claim 7 wherein said chromium-based film consists essentially of chromium oxide.
Claim 11
Dependent Claim
18 words
The electrically heated windshield of claim 7 wherein said chromium-based film consists essentially of chromium oxide and chromium.
Claim 12
Dependent Claim
21 words
The electrically heated windshield of claim 7 wherein said chromium-based film is from about 25 angstroms to about 100 angstroms thick.
Claim 13
Dependent Claim
145 words
An electrically heated windshield for a motor vehicle, which windshield comprises: a first glass template having an outboard surface and an oppositely facing inboard surface; an electrically conductive, transparent, metal-based coating on said inboard surface of said first glass template, said metal-based coating comprising a first zinc oxide film immediately adjacent said inboard surface, a silver film over said first zinc oxide film and a second zinc oxide film over said silver film; a chromium-based film consisting essentially of chromium oxide and chromium and being from about 25 to 100 angstroms thick over said second zinc oxide film; a layer of polyvinyl butyral material substantially coextensive with said first glass template and having an outboard surface bonded to said chromium-based film; and a second glass template bonded to an inboard surface of said layer of polyvinyl butyral material opposite said outboard surface of said layer.
Claim 14
Dependent Claim
145 words
An electrically heated windshield for a motor vehicle, which windshield comprises: a first glass template having an outboard surface and an oppositely facing inboard surface; an electrically conductive, transparent, metal-based coating on said inboard surface of said first glass template, said metal-based coating comprising a first zinc oxide film immediately adjacent said inboard surface, a silver film over said first zinc oxide film and a second zinc oxide film over said silver film; a chromium-based film consisting essentially of chromium oxide and chromium and being from about 25 to 100 angstroms thick over said second zinc oxide film; a layer of polyvinyl butyral material substantially coextensive with said first glass template and having an outboard surface bonded to said chromium-based film; and a second glass template bonded to an inboard surface of said layer of polyvinyl butyral material opposite said outboard surface of said layer.
Claim 15
Independent Claim
92 words
A method of making a transparent glass article having improved adhesion between a coated glass substrate and a layer of polyvinyl butyral material, wherein said coated glass substrate comprises a glass substrate and an electrically conductive, transparent, metal-based coating on a surface of said glass substrate, which method comprises the steps of: (A) providing said coated glass substrate; (B) coating said metal-based coating of said coated glass substrate with a chromium-based film; and (C) bonding said polyvinyl butyral material to said coated glass substrate over said chromium-based film using heat and pressure.
Claim 16
Independent Claim
92 words
A method of making a transparent glass article having improved adhesion between a coated glass substrate and a layer of polyvinyl butyral material, wherein said coated glass substrate comprises a glass substrate and an electrically conductive, transparent, metal-based coating on a surface of said glass substrate, which method comprises the steps of: (A) providing said coated glass substrate; (B) coating said metal-based coating of said coated glass substrate with a chromium-based film; and (C) bonding said polyvinyl butyral material to said coated glass substrate over said chromium-based film using heat and pressure.
Claim 17
Dependent Claim
14 words
The method of claim 12 wherein said chromium-based film consists essentially of chromium oxide.
Claim 18
Dependent Claim
16 words
The method of claim 12 wherein said chromium-based film consists essentially of chromium oxide and chromium.
Claim 19
Dependent Claim
39 words
The method of claim 12 wherein said metal-based coating comprises a first zinc oxide film immediately adjacent said glass substrate; a silver film over said first zinc oxide film and a second zinc oxide film over said silver film.
Claim 20
Dependent Claim
28 words
The method of claim 12 wherein said (B) step comprises coating said metal-based coating of said glass substrate with a chromium-based film about 25 to 100 angstroms thick.
Claim 21
Dependent Claim
17 words
The method of claim 12 wherein said article is an electrically heated windshield of a motor vehicle.
Claim 22
Independent Claim
76 words
A method of improving the adhesion between a transparent and electrically conductive coating on a glass vision unit and polyvinyl butyral material which comprises the steps of: subjecting the transparent and electrically conductive coating on the glass vision unit to a coating operation in which a thin layer of chromium oxide is placed thereover; and bonding said chromium oxide coated glass vision unit to the polyvinyl butyral material in a bonding operation employing heat and pressure.
Claim 23
Independent Claim
76 words
A method of improving the adhesion between a transparent and electrically conductive coating on a glass vision unit and polyvinyl butyral material which comprises the steps of: subjecting the transparent and electrically conductive coating on the glass vision unit to a coating operation in which a thin layer of chromium oxide is placed thereover; and bonding said chromium oxide coated glass vision unit to the polyvinyl butyral material in a bonding operation employing heat and pressure.
Claim 24
Independent Claim
140 words
A method of making an electrically heated windshield for a motor vehicle, which method comprises the steps of: (A) providing a coated glass substrate comprising a first glass template and an electrically conductive, transparent, metal-based coating on an inboard surface of said first glass template, said metal based coating comprising a first zinc oxide film immediately adjacent said inboard surface, a silver film over said first zinc oxide film and a second zinc oxide over said silver film; (B) coating said metal-based coating of said coated glass substrate with a chromium-based film consisting essentially of chromium oxide and chromium and being about 25 to 100 angstroms thick; (C) laminating a layer of polyvinyl butyral material between said first glass template, said inboard surface thereof toward said layer of polyvinyl butyral material, and a second glass substrate, using heat and pressure.
Claim 25
Independent Claim
140 words
A method of making an electrically heated windshield for a motor vehicle, which method comprises the steps of: (A) providing a coated glass substrate comprising a first glass template and an electrically conductive, transparent, metal-based coating on an inboard surface of said first glass template, said metal based coating comprising a first zinc oxide film immediately adjacent said inboard surface, a silver film over said first zinc oxide film and a second zinc oxide over said silver film; (B) coating said metal-based coating of said coated glass substrate with a chromium-based film consisting essentially of chromium oxide and chromium and being about 25 to 100 angstroms thick; (C) laminating a layer of polyvinyl butyral material between said first glass template, said inboard surface thereof toward said layer of polyvinyl butyral material, and a second glass substrate, using heat and pressure.
Claim 26
Independent Claim
132 words
A method of making an electrically heated windshield for a motor vehicle, which method comprises the steps of: (A) placing bus bars and an electrically conductive, transparent, metal-based coating on an inboard surface of said first glass template, said metal-based coating comprising a first zinc oxide film immediately adjacent said inboard surface, a silver film over said first zinc oxide film and a second zinc oxide over said silver film; (B) coating said metal-based coating of said coated glass substrate and a chromium-based film consisting essentially of chromium oxide and chromium and being about 25 to 100 angstroms thick; (C) laminating a layer of polyvinyl butyral material between said first glass template, said inboard surface thereof toward said layer of polyvinyl butyral material, and a second glass substrate, using heat and pressure.
Claim 27
Independent Claim
132 words
A method of making an electrically heated windshield for a motor vehicle, which method comprises the steps of: (A) placing bus bars and an electrically conductive, transparent, metal-based coating on an inboard surface of said first glass template, said metal-based coating comprising a first zinc oxide film immediately adjacent said inboard surface, a silver film over said first zinc oxide film and a second zinc oxide over said silver film; (B) coating said metal-based coating of said coated glass substrate and a chromium-based film consisting essentially of chromium oxide and chromium and being about 25 to 100 angstroms thick; (C) laminating a layer of polyvinyl butyral material between said first glass template, said inboard surface thereof toward said layer of polyvinyl butyral material, and a second glass substrate, using heat and pressure.
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) | 1992-07-03 | 1993-01-02 | 1993-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-03 | 1997-01-02 | 1997-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-03 | 2001-01-02 | 2001-07-04 | $7700.00 | Window Closed / Lapsed |