Patent US2654233A successfully refreshed from Google Patents.
US2654233A
Expired / Lapsed
US
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Air conditioning unit for casement windows
Assignee: Individual
•
Filing: 1951-05-31
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Granted: 1953-10-06
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Expires: 1971-05-31
Abstract
No abstract record available.
Inventors
- 👤 Dwight L Shoemaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:30
CPC Classifications
F; F24; F24F; F24F1/00; F24F1/02; F24F1/022; F24F1/027
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2081106A
Cited
US2278989A
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US2357362A
Cited
US2386883A
Cited
US2294664A
Cited
US2405411A
Cited
US2433104A
Cited
US2610483A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-05 | 1957-04-06 | 1957-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-05 | 1961-04-06 | 1961-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-05 | 1965-04-06 | 1965-10-06 | $7700.00 | Window Closed / Lapsed |