Patent US3712819A successfully refreshed from Google Patents.
US3712819A
Expired / Lapsed
US
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Ventilated open-air indoor broiler having damper means and control therefor
Assignee: Individual
•
Filing: 1971-11-23
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Granted: 1973-01-23
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Expires: 1991-11-23
Abstract
Abstract VENTILATED OPEN-AIR INDOOR BROILER HAVING DAMPER MEANS AND POSITIONABLE CONTROL THEREOF COMPRISING AN ENERGIZING SWITCH FOR ELECTRIC HEATING ELEMENTS.
Inventors
- 👤 T Field
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:22
CPC Classifications
A; A47; A47J; A47J37/00; A47J37/06; A47J37/07; F; F24; F24C; F24C15/00; F24C15/20; F24C15/2042
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) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |