Patent US2784571A successfully refreshed from Google Patents.
US2784571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Evaporative air cycle cooler
Assignee: —
•
Filing: —
•
Granted: 1957-03-12
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Expires: 1974-03-12
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:00
CPC Classifications
F; F24; F24F; F24F5/00; F24F5/0085
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2176645A
Cited
US2175469A
Cited
US2114787A
Cited
US2133334A
Cited
US2147248A
Cited
US2256940A
Cited
US2477932A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-11 | 1960-09-10 | 1961-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-11 | 1964-09-10 | 1965-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-11 | 1968-09-10 | 1969-03-12 | $7700.00 | Window Closed / Lapsed |