US2529167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leakproof oil filter
Assignee: Individual
•
Filing: 1946-04-26
•
Granted: 1950-11-07
•
Expires: 1966-04-26
Abstract
No abstract record available.
Inventors
- 👤 Lewis Felix
- 👤 Shuler James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:30
CPC Classifications
B; B01; B01D; B01D27/00; B01D27/02; B01D27/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US544262A
Cited
US826654A
Cited
US1256766A
Cited
US1729135A
Cited
US1647799A
Cited
US2106863A
Cited
US2206358A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |