US3335643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine having piston with sealed compression ring
Assignee: Motors Liquidation Co
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Filing: 1965-10-15
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Granted: 1967-08-15
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Expires: 1985-10-15
Abstract
No abstract record available.
Inventors
- 👤 Joseph T Wentworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:06
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/12; F16J9/14; F16J9/18; F16J9/08; Y; Y10; Y10S; Y10S277/00; Y10S277/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
IN COMBINATION WITH AN INTERNAL COMBUSTION ENGINE HAVING A CYLINDER AND A COMBUSTION CHAMBER AT ONE END OF SAID CYLINDER, A PISTON ASSEMBLY INSTALLED FOR RECIPROCATION IN SAID CYLINDER AND COMPRISING A CYLINDRICAL PISTON HAVING A PERIPHERAL GROOVE, A COMPRESSION RING IN SAID GROOVE AND CONTACTING SAID CYLINDER TO SEAL SAID COMBUSTION CHAMBER, SAID RING AND SAID GROOVE DEFINING A CLEARANCE VOLUME BEHIND SAID RING AND
Claim 2
Dependent Claim
66 words
IN COMBINATION WITH AN INTERNAL COMBUSTION ENGINE HAVING A CYLINDER AND A COMBUSTION CHAMBER AT ONE END OF SAID CYLINDER, A PISTON ASSEMBLY INSTALLED FOR RECIPROCATION IN SAID CYLINDER AND COMPRISING A CYLINDRICAL PISTON HAVING A PERIPHERAL GROOVE, A COMPRESSION RING IN SAID GROOVE AND CONTACTING SAID CYLINDER TO SEAL SAID COMBUSTION CHAMBER, SAID RING AND SAID GROOVE DEFINING A CLEARANCE VOLUME BEHIND SAID RING AND
References Cited (Backward Citations)
US2468980A
Cited
US2799523A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |