Patent US2500779A successfully refreshed from Google Patents.
US2500779A
Expired / Lapsed
US
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Refrigeration apparatus having a damper controlled by a thermostat
Assignee: Westinghouse Electric Corp
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Filing: 1947-06-27
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Granted: 1950-03-14
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Expires: 1967-06-27
Abstract
No abstract record available.
Inventors
- 👤 Albert E Truelove
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:53
CPC Classifications
F; F25; F25D; F25D17/00; F25D17/04; F25D17/042; F25D17/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1727777A
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US1844822A
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US2270407A
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US2242718A
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US2253930A
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US2363010A
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US2292032A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |