Patent US2576140A successfully refreshed from Google Patents.
US2576140A
Expired / Lapsed
US
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Air-conditioning apparatus
Assignee: ROBERT H HENLEY
•
Filing: 1946-06-15
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Granted: 1951-11-27
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Expires: 1966-06-15
Abstract
No abstract record available.
Inventors
- 👤 Neal A Pennington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:26
CPC Classifications
F; F24; F24F; F24F6/00; F24F6/02; F24F6/06; F24F2203/00; F24F2203/10; F24F2203/104; Y; Y02; Y02B; Y02B30/00; Y02B30/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2266219A
Cited
US2072486A
Cited
GB466382A
Cited
US2347031A
Cited
US2288981A
Cited
US2342841A
Cited
US2353937A
Cited
US2464766A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-26 | 1955-05-28 | 1955-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-26 | 1959-05-28 | 1959-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-26 | 1963-05-28 | 1963-11-27 | $7700.00 | Window Closed / Lapsed |