US4683168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing a composite body
Assignee: Corning Glass Works
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Filing: 1986-02-18
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Granted: 1987-07-28
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Expires: 2006-02-18
Abstract
Abstract A composite body consisting of a glass or glass-ceramic substrate with a non-stick, heat resistant resin composition bonded to a surface thereof. Suitable substrates are those which contain one or more differentially etchable components. Particularly useful are glass compositions which undergo phase separation upon heat treatment. For example, some borosilicate glasses separate into a silica-rich phase and a borate-rich phase when heated to about 600° C. and maintained at that temperature for about one hour. The substrate is etched to remove at least a portion of one component to provide a bonding surface containing extremely small pores of relatively uniform diameter for a non-stick heat resistant resin composition. The resin composition is uniformly applied to the etched substrate in liquid form and subsequently hardened, suitably by fusion, to form a solid, substantially continuous film over the etched surface.
Inventors
- 👤 George B. Hares
- 👤 David L. Morse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:04
CPC Classifications
C; C03; C03C; C03C15/00; C03C17/00; C03C17/28; C03C17/32; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31; Y10T428/315; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T428/31551; Y10T428/31645; Y10T428/31649
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
109 words
A composite comprising: (a) a substrate of glass or glass-ceramic having one or more differentially etchable components, the crystals of said glass-ceramic having an average size less than about 5 microns, and said substrate having an etched surface resulting from the differential etching of said surface; the etched surface on said substrate extending to a depth of between about 500-4000 Å with interconnected pores of relatively uniform diameters of about 50-30,000Å relatively homogeneously dispersed throughout the etched surface; and (b) a non-stick, heat resistant resin bonded to said etched surface through diffusion-type adhesive interaction on a molecular scale, said resin having a thickness of at least about 15 microns.
Claim 2
Dependent Claim
109 words
A composite comprising: (a) a substrate of glass or glass-ceramic having one or more differentially etchable components, the crystals of said glass-ceramic having an average size less than about 5 microns, and said substrate having an etched surface resulting from the differential etching of said surface; the etched surface on said substrate extending to a depth of between about 500-4000 Å with interconnected pores of relatively uniform diameters of about 50-30,000Å relatively homogeneously dispersed throughout the etched surface; and (b) a non-stick, heat resistant resin bonded to said etched surface through diffusion-type adhesive interaction on a molecular scale, said resin having a thickness of at least about 15 microns.
Claim 3
Dependent Claim
20 words
The composite of claim 1 wherein the non-stick, heat resistant resin ranges from about 15 to 30 microns in thickness.
Claim 4
Dependent Claim
21 words
The composite of claim 1 wherein the substrate is a glass-ceramic with pores of relatively uniform diameters of about 0.05-1 micron.
Claim 5
Dependent Claim
13 words
The composite of claim 1 wherein the non-stick, heat resistant resin is fused.
Claim 6
Dependent Claim
13 words
The composite of claim 1 wherein the substrate is a phase separable glass.
Claim 7
Dependent Claim
12 words
The composite of claim 5 wherein the substrate is a borosilicate glass.
Claim 8
Dependent Claim
18 words
The composite of claim 1 wherein the non-stick, heat resistant resin coating contains a preponderant amount of polytetrafluorethylene.
Claim 9
Dependent Claim
12 words
The composite of claim 7 wherein the coating is substantially entirely polytetrafluoroethylene.
Claim 10
Dependent Claim
14 words
The composite of claim 1 wherein said substrate is bonded to a metal base.
Claim 11
Dependent Claim
12 words
The composite of claim 9 wherein the substrate is phase separable glass.
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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) | 1990-07-27 | 1991-01-26 | 1991-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-27 | 1995-01-26 | 1995-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-27 | 1999-01-26 | 1999-07-28 | $7700.00 | Window Closed / Lapsed |