US2886180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Full flow filter with oil retaining means
Assignee: Caterpillar Inc
•
Filing: 1956-03-19
•
Granted: 1959-05-12
•
Expires: 1976-03-19
Abstract
No abstract record available.
Inventors
- 👤 Milford B Morgan
- 👤 Albert W Crumrine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:19
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/30; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/60; B01D29/605; B01D29/88; B01D29/90; B01D29/902; B01D29/92; B01D29/925; B01D35/14; B01D35/143; B01D2201/00; B01D2201/30; B01D2201/301
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2462488A
Cited
US2657807A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-11 | 1962-11-10 | 1963-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-11 | 1966-11-10 | 1967-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-11 | 1970-11-10 | 1971-05-12 | $7700.00 | Window Closed / Lapsed |