Patent US3719178A successfully refreshed from Google Patents.
US3719178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine
Assignee: Perkins Ltd
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Filing: 1971-11-10
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Granted: 1973-03-06
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Expires: 1991-11-10
Abstract
Abstract AN IMPROVED INTERNAL COMBUSTION ENGINE CONSISTS OF A UNITARY CRANK CASE HAVING A CAVITY CAST AT THE MIDDLE OF ITS LENGTH TO HOUSE THE TIMING DRIVE AND A DRIVE TO AUXILIARY EQUIPMENT. THE CAVITY HAS OPENINGS AND THE AUXILIARY EQUIPMENT IS MOUNTED ON LOAD BEARING COVERS WHICH CLOSE THESE OPENINGS.
Inventors
- 👤 W Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:05
CPC Classifications
F; F02; F02B; F02B63/00; F02B63/04; F01; F01L; F01L1/00; F01L1/02; F01L1/024; F01L1/026; F02B67/00; F02B67/04; F02B75/00; F02B75/16; F02B75/18; F02B75/20; F02B75/22; F02B2075/1804; F02B2075/1824; F02B63/044
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) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |