US4961996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-stick coatings on glass
Assignee: Corning Inc
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Filing: 1988-12-22
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Granted: 1990-10-09
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Expires: 2008-12-22
Abstract
Abstract Articles with a non-stick coating. An article consisting of a substrate whose surface has --OH groups, and of at least one non-stick polymer layer, said article having also, applied between said substrate and said non-stick polymer layer, a layer which is obtained by making an appropriate bifunctional organo-silane react with a polyamic-acid precursor of polyamide-imide and with --OH groups of the substrate surface, then drying and converting said polyamic-acid into a polyamide-imide by heating at an appropriately high temperature.
Inventors
- 👤 Alain R. E. Carre
- 👤 Francoise M. M. Roger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:04
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/34; C03C17/3405; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31536; Y10T428/3154; Y10T428/31544; Y10T428/31551; Y10T428/31609; Y10T428/31612; Y10T428/31623; Y10T428/31652; Y10T428/31663; Y10T428/31721
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
67 words
A coated article comprising: a glass or glass-ceramic substrate a polyamide-imide film bonded to at least a portion of said substrate, the film being a reaction product of an organosilane and a polyamide-imide prepolymer; and a non-stick polymer layer bonded to at least a portion of said film, the non-stick polymer layer being formed of a material selected from the group consisting of silicone and fluorocarbon polymers.
Claim 2
Dependent Claim
67 words
A coated article comprising: a glass or glass-ceramic substrate a polyamide-imide film bonded to at least a portion of said substrate, the film being a reaction product of an organosilane and a polyamide-imide prepolymer; and a non-stick polymer layer bonded to at least a portion of said film, the non-stick polymer layer being formed of a material selected from the group consisting of silicone and fluorocarbon polymers.
Claim 3
Dependent Claim
27 words
A coated article in accordance with claim 1 which is an article of glass cookware and which comprises a non-stick polymer layer formed of a silicone polymer.
Claim 4
Dependent Claim
25 words
A coated article in accordance with claim 1 which is an article of glass-ceramic cookware comprising a non-stick polymer layer formed of a fluorocarbon polymer.
Claim 5
Dependent Claim
17 words
A coated article in accordance with claim 1 wherein the polyamide-imide film further comprises a coloring pigment.
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) | 1993-10-08 | 1994-04-09 | 1994-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-08 | 1998-04-09 | 1998-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-08 | 2002-04-09 | 2002-10-09 | $7700.00 | Window Closed / Lapsed |