Patent US2296822A successfully refreshed from Google Patents.
US2296822A
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Air conditioning apparatus
Assignee: Westinghouse Electric Corp
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Filing: 1938-04-23
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Granted: 1942-09-22
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Expires: 1958-04-23
Abstract
No abstract record available.
Inventors
- 👤 Edward R Wolfert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:54
CPC Classifications
F; F25; F25B; F25B49/00; F25B49/02; F25B49/022; F24; F24F; F24F11/00; F24F11/30; F24F11/70; F24F11/80; F24F11/81; F24F11/83; F25B2341/00; F25B2341/06; F25B2341/068; F25B2341/0681; F25B2400/00; F25B2400/07; F25B2400/074; F25B2600/00; F25B2600/21
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) | 1945-09-21 | 1946-03-23 | 1946-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-09-21 | 1950-03-23 | 1950-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-09-21 | 1954-03-23 | 1954-09-22 | $7700.00 | Window Closed / Lapsed |