Patent EP0045505A2 successfully refreshed from Google Patents.
Patent US1937740A successfully refreshed from Google Patents.
US1937740A
Expired / Lapsed
US
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Internal combustion engine
Assignee: Packard Motor Car Co
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Filing: 1931-02-14
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Granted: 1933-12-05
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Expires: 1951-02-14
Abstract
No abstract record available.
Inventors
- 👤 Emma F Woolson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:41
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/16; F02B75/18; F02B75/22; F02B75/222; B; B64; B64D; B64D31/00; B64D31/02; B64D31/04; F01; F01L; F01L1/00; F01L1/36; F01L1/42; F02M; F02M2700/00; F02M2700/13; F02M2700/1317; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20636; Y10T74/20672; Y10T74/20678
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1936-12-04 | 1937-06-05 | 1937-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-12-04 | 1941-06-05 | 1941-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-12-04 | 1945-06-05 | 1945-12-05 | $7700.00 | Window Closed / Lapsed |