US3418982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable compression ratio piston assembly
Assignee: CONTINENTAL AVIAT ENGINEERING
•
Filing: 1967-07-20
•
Granted: 1968-12-31
•
Expires: 1987-07-20
Abstract
No abstract record available.
Inventors
- 👤 William J Waugaman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:29
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/04; F02B75/044
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2910826A
Cited
US3156162A
Cited
US3161112A
Cited
US3185137A
Cited
US3185138A
Cited
US3303831A
Cited
US3311096A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |