US2823907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotatable evaporative cooler for airconditioning
Assignee: ROBERT H HENLEY
•
Filing: 1950-03-10
•
Granted: 1958-02-18
•
Expires: 1970-03-10
Abstract
No abstract record available.
Inventors
- 👤 Neal A Pennington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:38
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F3/1411; F24F3/1423; F24F6/00; F24F6/02; F24F6/06; F24F2003/1458; F24F2003/1464; F24F2203/00; F24F2203/10; F24F2203/1004; F24F2203/1012; F24F2203/1016; F24F2203/1032; F24F2203/104; F24F2203/1072; F24F2203/108; F24F2203/1084
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2563415A
Cited
US1240656A
Cited
US1450951A
Cited
US1762320A
Cited
US2037317A
Cited
US2427714A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-17 | 1961-08-19 | 1962-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-17 | 1965-08-19 | 1966-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-17 | 1969-08-19 | 1970-02-18 | $7700.00 | Window Closed / Lapsed |