US3301231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing device for rotary piston engines
Assignee: Yanmar Co Ltd
•
Filing: 1965-07-12
•
Granted: 1967-01-31
•
Expires: 1985-07-12
Abstract
No abstract record available.
Inventors
- 👤 Tado Hiroshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:27
CPC Classifications
F; F01; F01C; F01C19/00; F01C19/02; F01C19/04; F01C19/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3127095A
Cited
US723656A
Cited
US3103920A
Cited
US3130900A
Cited
US3176909A
Cited
US3251541A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |