Patent US2725729A successfully refreshed from Google Patents.
US2725729A
Expired / Lapsed
US
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Evaporative type air cooler
Assignee: Individual
•
Filing: 1954-05-26
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Granted: 1955-12-06
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Expires: 1974-05-26
Abstract
No abstract record available.
Inventors
- 👤 Clarence B Mills
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:17
CPC Classifications
F; F24; F24F; F24F6/00; F24F6/02; F24F6/04; F24F1/00; F24F1/0007; F24F1/0035; F24F1/0043; F24F1/0047; F24F1/0059; F24F5/00; F24F5/0007; Y; Y02; Y02B; Y02B30/00; Y02B30/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1962572A
Cited
US2165979A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-05 | 1959-06-06 | 1959-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-05 | 1963-06-06 | 1963-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-05 | 1967-06-06 | 1967-12-06 | $7700.00 | Window Closed / Lapsed |