US2739794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air heating and cooling apparatus
Assignee: Motors Liquidation Co
•
Filing: 1952-03-22
•
Granted: 1956-03-27
•
Expires: 1972-03-22
Abstract
No abstract record available.
Inventors
- 👤 Charles D Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:09
CPC Classifications
F; F25; F25B; F25B29/00; F25B29/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2319062A
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US1701978A
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US1933330A
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US2186145A
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US2155256A
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US2212222A
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US2238688A
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US2381427A
Cited
US2547657A
Cited
US2572582A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-27 | 1959-09-26 | 1960-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-27 | 1963-09-26 | 1964-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-27 | 1967-09-26 | 1968-03-27 | $7700.00 | Window Closed / Lapsed |