Patent US2894376A successfully refreshed from Google Patents.
US2894376A
Expired / Lapsed
US
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Air conditioning apparatus and method
Assignee: Surface Combustion Corp
•
Filing: 1955-10-20
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Granted: 1959-07-14
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Expires: 1975-10-20
Abstract
No abstract record available.
Inventors
- 👤 Gilbert A Kelley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:40
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F3/1411; F24F3/1417; F24F2003/144
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US683492A
Cited
US2114787A
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US2156293A
Cited
US2159276A
Cited
US2269053A
Cited
US2587485A
Cited
US2515098A
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US2556250A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-13 | 1963-01-12 | 1963-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-13 | 1967-01-12 | 1967-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-13 | 1971-01-12 | 1971-07-14 | $7700.00 | Window Closed / Lapsed |