US2489754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Farm freezer evaporator
Assignee: Carrier Corp
•
Filing: 1946-11-30
•
Granted: 1949-11-29
•
Expires: 1966-11-30
Abstract
No abstract record available.
Inventors
- 👤 Thomas G Crider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:17
CPC Classifications
F; F25; F25B; F25B39/00; F25B39/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1829387A
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US1751317A
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US1868907A
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US2014703A
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US1975046A
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US2124110A
Cited
US2231012A
Cited
US2405432A
Cited
US2327355A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-28 | 1953-05-30 | 1953-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-28 | 1957-05-30 | 1957-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-28 | 1961-05-30 | 1961-11-29 | $7700.00 | Window Closed / Lapsed |