US4277522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating glass-ceramic surfaces
Assignee: Corning Glass Works
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Filing: 1977-01-03
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Granted: 1981-07-07
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Expires: 1997-01-03
Abstract
Abstract A process for enhancing the adhesion of coatings applied to the surfaces of glass-ceramic articles. The surface area to be coated is roughened before the article is completely cerammed. When the article is subjected to elevated temperatures for the purpose of converting the green glass to a glass-ceramic, flaws produced by the abrasion step are healed. The coating can be applied before or after the ceramming step.
Inventors
- 👤 William G. Dorfeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:44
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/06; C03C2217/00; C03C2217/20; C03C2217/28; C03C2217/282; C03C2218/00; C03C2218/10; C03C2218/15; C03C2218/152; C03C2218/153; C03C2218/30; C03C2218/31
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
84 words
In the method of providing a coating on a surface of a glass-ceramic article formed by ceramming a green glass article comprising the steps of roughening said surface, and thereafter applying a coating to said roughened surface, the improvement comprising: roughening said green glass article prior to the time that ceramming is initiated, and thereafter heating said article to an elevated temperature which is sufficiently high to ceram said article and to substantially heal mechanical damage in said article caused by said roughening step.
Claim 2
Dependent Claim
84 words
In the method of providing a coating on a surface of a glass-ceramic article formed by ceramming a green glass article comprising the steps of roughening said surface, and thereafter applying a coating to said roughened surface, the improvement comprising: roughening said green glass article prior to the time that ceramming is initiated, and thereafter heating said article to an elevated temperature which is sufficiently high to ceram said article and to substantially heal mechanical damage in said article caused by said roughening step.
Claim 3
Dependent Claim
23 words
The method of claim 1 wherein the step of heating said article comprises subjecting said article to a temperature greater than 800° C.
Claim 4
Dependent Claim
30 words
The method of claim 1 wherein said article is a skillet and wherein the step of heating said article comprises subjecting said skillet to a temperature greater than 900° C.
Claim 5
Independent Claim
98 words
The method of providing a coating on a surface of a glass-ceramic article comprising: providing an article of green glass of such a composition that it is capable of being converted, upon heating, to a glass-ceramic material, roughening a surface of said green glass article, thereafter applying a coating to said roughened surface of said green glass article, and subjecting said green glass article to an elevated temperature for a sufficient period of time to convert said green glass article to a glass-ceramic article and to substantially heal mechanical damage in said article caused by said roughening step.
Claim 6
Independent Claim
98 words
The method of providing a coating on a surface of a glass-ceramic article comprising: providing an article of green glass of such a composition that it is capable of being converted, upon heating, to a glass-ceramic material, roughening a surface of said green glass article, thereafter applying a coating to said roughened surface of said green glass article, and subjecting said green glass article to an elevated temperature for a sufficient period of time to convert said green glass article to a glass-ceramic article and to substantially heal mechanical damage in said article caused by said roughening step.
Claim 7
Dependent Claim
33 words
The method of claim 4 wherein said article is a skillet and the step of subjecting said article to an elevated temperature comprises subjecting said article to a temperature greater than 900° C.
Claim 8
Dependent Claim
11 words
The method of claim 5 wherein said coating consists of silicon.
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) | 1984-07-06 | 1985-01-05 | 1985-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-06 | 1989-01-05 | 1989-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-06 | 1993-01-05 | 1993-07-07 | $7700.00 | Window Closed / Lapsed |