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US2166397A
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Evaporative cooler
Assignee: Niagara Blower Co
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Filing: 1937-02-12
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Granted: 1939-07-18
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Expires: 1957-02-12
Abstract
No abstract record available.
Inventors
- 👤 Charles N Deverall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:08
CPC Classifications
F; F28; F28D; F28D5/00; F28D5/02; F25; F25B; F25B39/00; F25B39/04; F28B; F28B1/00; F28B1/06; F25B2339/00; F25B2339/04; F25B2339/041
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-07-17 | 1943-01-16 | 1943-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-07-17 | 1947-01-16 | 1947-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-07-17 | 1951-01-16 | 1951-07-18 | $7700.00 | Window Closed / Lapsed |