US2826398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Evaporative air cooler
Assignee: Individual
•
Filing: 1955-12-27
•
Granted: 1958-03-11
•
Expires: 1975-12-27
Abstract
No abstract record available.
Inventors
- 👤 William A Norris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:39
CPC Classifications
F; F24; F24F; F24F6/00; F24F6/02; F24F6/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1276285A
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US1578333A
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US1750969A
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US1952269A
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US2062158A
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US2508683A
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US2498818A
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US2713509A
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US2769620A
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US2752134A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-10 | 1961-09-09 | 1962-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-10 | 1965-09-09 | 1966-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-10 | 1969-09-09 | 1970-03-11 | $7700.00 | Window Closed / Lapsed |