US2748949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined full-flow and part-flow oil filter
Assignee: Fram Corp
•
Filing: 1954-09-28
•
Granted: 1956-06-05
•
Expires: 1974-09-28
Abstract
No abstract record available.
Inventors
- 👤 William S James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:55
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/21; B01D29/50; B01D29/52; B01D29/54; B01D35/00; B01D35/14; B01D35/147; B01D35/157; B01D35/1576; Y; Y10; Y10S; Y10S210/00; Y10S210/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1722335A
Cited
US2253686A
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US2253685A
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US2271054A
Cited
US2406308A
Cited
US2598322A
Cited
US2533266A
Cited
GB678939A
Cited
US2562361A
Cited
US2680520A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |