Patent US3211325A successfully refreshed from Google Patents.
US3211325A
Expired / Lapsed
US
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Non-stick surface for cooking vessel or the like
Assignee: Westinghouse Electric Corp
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Filing: 1963-07-11
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Granted: 1965-10-12
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Expires: 1983-07-11
Abstract
No abstract record available.
Inventors
- 👤 Wisnicki Julian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:39
CPC Classifications
B; B05; B05D; B05D5/00; B05D5/08; B05D5/083; B05D5/086; A; A21; A21D; A21D8/00; A21D8/08; A47; A47J; A47J36/00; A47J36/02; C; C23; C23C; C23C4/00; C23C4/04; C23C4/06; C23C4/08; C23C4/18; Y; Y10; Y10S; Y10S159/00; Y10S159/13; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
84 words
A COOKING VESSEL HAVING A SOLID METAL BASE AND A NON-STICK SURFACE FABRICATED BY FORMING ON THE SOLID METAL BASE A POROUS LAYER OF COMPATIBLE MATERIAL, DEPOSITING ON SAID LAYER AND IN PORES THEREOF AN EXCESS OF POLYTETRAFLUOROTHYLENE RESIN, AND SHOT-PEENING THE EXPOSED SURFACE, THEREBY REDUCING THE REMAINING POROSITY OF THE LAYER AND BINDING THE RESIN IMPREGNATED THEREIN, SAID FABRICATED NON-STICK SURFACE EXHIBITING ISLAND PEAKS OF THE COMPATIBLE MATERIAL SURROUNDED BY THE RESIN WITH SAID PEAKS DEFORMED OUTWARDLY OVER ADJACENT PORTIONS OF THE RESIN.
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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) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |