US3400939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil seal construction for rotary engines
Assignee: John Deere Technologies International Inc
•
Filing: 1966-01-03
•
Granted: 1968-09-10
•
Expires: 1986-01-03
Abstract
No abstract record available.
Inventors
- 👤 Jones Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:00
CPC Classifications
F; F01; F01C; F01C19/00; F01C19/10; F01C19/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3171590A
Cited
DE1151993B
Cited
US3196849A
Cited
US3176915A
Cited
US3176910A
Cited
US3206109A
Cited
US3180563A
Cited
US3321128A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-10 | 1972-03-11 | 1972-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-10 | 1976-03-11 | 1976-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-10 | 1980-03-11 | 1980-09-10 | $7700.00 | Window Closed / Lapsed |