Patent US3606602A successfully refreshed from Google Patents.
US3606602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion chamber of rotary pistion engine
Assignee: Yanmar Co Ltd
•
Filing: 1969-10-23
•
Granted: 1971-09-20
•
Expires: 1989-10-23
Abstract
Abstract A RECESS HAVING THE LEADING END PORTION THEREOF BIFURCATED IS FORMED IN EACH SECTION OF THE ROTOR AT SUCH A LOCATION THAT THE TIME WHEN SAID RECESS IS BROUGH INTO COMMUNICATION WITH AN INNER OPENING OF THE IGNITION PLUG MOUNTING HOLE IN THE CYLINDRICAL HOUSING COINCIDES OR SUBSTANTIALLY COINCIDES WITH THE TIME WHEN THE IGNITION PLUG SPARKS.
Inventors
- 👤 Yoshitugu Hamada
- 👤 Noritoshi Taniguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:48
CPC Classifications
F; F02; F02B; F02B55/00; F02B55/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |