Patent US2687183A successfully refreshed from Google Patents.
US2687183A
Expired / Lapsed
US
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Engine air conditioner
Assignee: Individual
•
Filing: 1952-07-29
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Granted: 1954-08-24
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Expires: 1972-07-29
Abstract
No abstract record available.
Inventors
- 👤 William F Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:46
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/02; F02M35/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1578611A
Cited
US2018493A
Cited
US2012508A
Cited
US2197595A
Cited
US2435798A
Cited
US2576503A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-23 | 1958-02-22 | 1958-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-23 | 1962-02-22 | 1962-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-23 | 1966-02-22 | 1966-08-24 | $7700.00 | Window Closed / Lapsed |