Patent US3263671A successfully refreshed from Google Patents.
US3263671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Space heater
Assignee: —
•
Filing: —
•
Granted: 1966-08-02
•
Expires: 1983-08-02
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:43
CPC Classifications
A; A01; A01G; A01G13/00; A01G13/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A SOLID FUEL SPACE HEATER, COMPRISING: AN IMPERFORATE CYLINDRICAL FIREPOT HAVING AN UPWARDLY OPEN MOUTH ONLY THROUGH WHICH AIR TO FUEL IN THE POT IS ACCESSIBLE; AN OPEN-ENDED TUBULAR STACK LATERALLY SMALLER THAN THE POT MOUTH AND SUBSTANTIALLY COAXIALLY DISPOSED IN SAID POT; AND AT LEAST TWO RESILIENT PLATES CHORDALLY DISPOSED IN EDGE CONTACT WITH SAID POT INNER WALL AND HAVING SURFACE
Claim 2
Dependent Claim
62 words
A SOLID FUEL SPACE HEATER, COMPRISING: AN IMPERFORATE CYLINDRICAL FIREPOT HAVING AN UPWARDLY OPEN MOUTH ONLY THROUGH WHICH AIR TO FUEL IN THE POT IS ACCESSIBLE; AN OPEN-ENDED TUBULAR STACK LATERALLY SMALLER THAN THE POT MOUTH AND SUBSTANTIALLY COAXIALLY DISPOSED IN SAID POT; AND AT LEAST TWO RESILIENT PLATES CHORDALLY DISPOSED IN EDGE CONTACT WITH SAID POT INNER WALL AND HAVING SURFACE
References Cited (Backward Citations)
US944745A
Cited
US1010461A
Cited
US1232276A
Cited
US1446353A
Cited
US1648041A
Cited
US2500658A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |