Patent US3148674A successfully refreshed from Google Patents.
US3148674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air circulating oven
Assignee: Wolf Range Corp
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Filing: 1963-06-24
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Granted: 1964-09-15
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Expires: 1983-06-24
Abstract
No abstract record available.
Inventors
- 👤 Russell T Boardman
- 👤 Howard C Fautz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:45
CPC Classifications
F; F24; F24C; F24C15/00; F24C15/32; F24C15/322
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
144 words
IN A ROASTING AND BAKING OVEN FOR FOOD PRODUCTS: A CLOSED OVEN CHAMBER INCLUDING TOP, BOTTOM, SIDE AND REAR WALLS; A HEATING CHAMBER SPACED FROM SAID TOP, BOTTOM AND SIDE WALLS, SAID HEATING CHAMBER INCLUDING A COMBUSTION CHAMBER BELOW SAID BOTTOM WALL HAVING HEATING MEANS THEREIN; AN IMPELLER WITHIN SAID OVEN CHAMBER ADJACENT TO SAID REAR WALL; MEANS EXTERNALLY OF SAID REAR WALL COUPLED TO SAID IMPELLER TO ROTATE THE SAME; A BAFFLE PLATE ADJACENT TO AND FORWARDLY OF SAID IMPELLER AND HAVING SIDE PORTIONS IN CLOSED RELATION TO SAID SIDE WALLS, SAID BAFFLE PLATE HAVING TOP AND BOTTOM EDGES SPACED FROM SAID TOP AND BOTTOM WALLS, RESPECTIVELY, SAID PLATE HAVING A CENTRAL OPENING THROUGH WHICH AIR IS PULLED REARWARDLY FROM SAID OVEN CHAMBER BY SAID IMPELLER AND DISCHARGED OUTWARDLY BY SAID IMPELLER BETWEEN SAID BAFFLE PLATE AND REAR WALL FOR RETURN PASSAGE AROUND
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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) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |