US2943737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter and method for purifying oil
Assignee: Motors Liquidation Co
•
Filing: 1957-07-24
•
Granted: 1960-07-05
•
Expires: 1977-07-24
Abstract
No abstract record available.
Inventors
- 👤 James A Norton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:31
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/18
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2321884A
Cited
US2347031A
Cited
US2343428A
Cited
GB665994A
Cited
US2629674A
Cited
US2613813A
Cited
GB687945A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |