US3306591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Evaporative cooler
Assignee: Individual
•
Filing: 1964-02-10
•
Granted: 1967-02-28
•
Expires: 1984-02-10
Abstract
No abstract record available.
Inventors
- 👤 Bruno G Valazza
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:48
CPC Classifications
F; F24; F24F; F24F6/00; F24F6/02; F24F6/06; F24F6/04; Y; Y10; Y10S; Y10S159/00; Y10S159/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2087436A
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US2237690A
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US2729436A
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US2868594A
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US3188061A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |