Patent US2520068A successfully refreshed from Google Patents.
Patent US3576667A successfully refreshed from Google Patents.
US3576667A
Expired / Lapsed
US
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Porcelain enamels for self-cleaning cooking oven
Assignee: Vibrantz Corp
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Filing: 1968-12-23
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Granted: 1971-04-27
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Expires: 1988-12-23
Abstract
Abstract A PORCELAIN ENAMEL FRIT CONTAINING A HIG LEVEL OF AN OXIDATION INDUCING METAL OXIDE, PREFERABLY COBALT, ADAPTABLE TO BE INCORPORATED INTO A VITREOUS PORCELAIN ENAMEL FOR APPLICATION TO AN OVEN LINER, SAID ENAMEL CHARACTERIZED BY THE ABILITY TO COMPLETELY OXIDIZE OVEN SOILS WHEN HEATED TO A POINT ABOVE 350*F., BUT BELOW 600*F., AND METHOD OF UTILIZING SAME AS A SELF-CLEANING OVEN LINER COATING.
Inventors
- 👤 William S Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:43
CPC Classifications
C; C03; C03C; C03C4/00; C03C8/00; C03C8/02; C03C8/04; C03C8/08; C03C8/10; C03C8/12; C23; C23D; C23D5/00; F; F24; F24C; F24C15/00; F24C15/005; C03C2205/00; C03C2205/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |