US2472729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration system
Assignee: Outboard Marine & Manufacturing Co
•
Filing: 1940-04-11
•
Granted: 1949-06-07
•
Expires: 1960-04-11
Abstract
No abstract record available.
Inventors
- 👤 Philip A Sidell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:32
CPC Classifications
F; F25; F25B; F25B43/00; F25B5/00; F25B5/04; F25B2400/00; F25B2400/05; F25B2400/052; F25B2400/054
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1830314A
Cited
US1830022A
Cited
US2005834A
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US2178020A
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US2132534A
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US2188893A
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US2131834A
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US2158792A
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US2046894A
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US2051971A
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US2116100A
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GB450730A
Cited
US2139110A
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US2117506A
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US2183346A
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US2181416A
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US2329139A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-06 | 1952-12-06 | 1953-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-06 | 1956-12-06 | 1957-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-06 | 1960-12-06 | 1961-06-07 | $7700.00 | Window Closed / Lapsed |