Patent US3516392A successfully refreshed from Google Patents.
US3516392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oscillating piston internal combustion engine
Assignee: Individual
•
Filing: 1968-07-01
•
Granted: 1970-06-23
•
Expires: 1988-07-01
Abstract
No abstract record available.
Inventors
- 👤 Paul E Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:18
CPC Classifications
F; F01; F01C; F01C1/00; F01C1/02; F01C1/063; F01C1/07; F02; F02B; F02B53/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1250859A
Cited
US1294487A
Cited
US1821139A
Cited
US1695888A
Cited
US2968290A
Cited
US3385272A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-22 | 1973-12-22 | 1974-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-22 | 1977-12-22 | 1978-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-22 | 1981-12-22 | 1982-06-23 | $7700.00 | Window Closed / Lapsed |