US2936857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine lubricating system
Assignee: Motors Liquidation Co
•
Filing: 1954-10-01
•
Granted: 1960-05-17
•
Expires: 1974-10-01
Abstract
No abstract record available.
Inventors
- 👤 Eugene B Etchells
- 👤 Adelbert E Kolbe
- 👤 Harry F Barr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:51
CPC Classifications
F; F01; F01M; F01M1/00; F01M1/06; F02; F02B; F02B75/00; F02B75/16; F02B75/18; F02B75/22
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1806537A
Cited
US981251A
Cited
US1631537A
Cited
US1428177A
Cited
DE441324C
Cited
US1823714A
Cited
US1909965A
Cited
US1834285A
Cited
US1899949A
Cited
US2010696A
Cited
DE664788C
Cited
US2199699A
Cited
GB574563A
Cited
US2489527A
Cited
US2572250A
Cited
US2568729A
Cited
CH279729A
Cited
US2723003A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-17 | 1963-11-16 | 1964-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-17 | 1967-11-16 | 1968-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-17 | 1971-11-16 | 1972-05-17 | $7700.00 | Window Closed / Lapsed |