Patent US2515319A successfully refreshed from Google Patents.
US2515319A
Expired / Lapsed
US
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Air conditioning
Assignee: Servel Inc
•
Filing: 1946-11-22
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Granted: 1950-07-18
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Expires: 1966-11-22
Abstract
No abstract record available.
Inventors
- 👤 Thomas K Sherwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:45
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F3/1405; F24F2003/144; F24F2003/1446; F24F2203/00; F24F2203/02; F24F2203/026; F24F8/00; F24F8/10; F24F8/108; F25; F25B; F25B15/00; F25B15/02; F25B15/06; Y; Y02; Y02A; Y02A50/00; Y02A50/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1981952A
Cited
US2061606A
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US2352814A
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US2399922A
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US2392894A
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US2469142A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-17 | 1954-01-16 | 1954-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-17 | 1958-01-16 | 1958-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-17 | 1962-01-16 | 1962-07-18 | $7700.00 | Window Closed / Lapsed |