Patent US2117361A successfully refreshed from Google Patents.
US2117361A
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US
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Oil filter with renewable filtering element
Assignee: FRANK B NETHERLAND
•
Filing: 1933-08-10
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Granted: 1938-05-17
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Expires: 1953-08-10
Abstract
No abstract record available.
Inventors
- 👤 Fred L Rohrbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:31
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/06; B01D27/00; B01D27/14; B01D29/00; B01D29/11; B01D29/13; B01D29/23; B01D29/50; B01D29/56; B03; B03C; B03C1/00; B03C1/02; B03C1/025; B03C1/031; B03C1/033; B03C1/0335; B03C1/28; B03C1/286; B03C2201/00; B03C2201/18; B03C2201/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1941-05-16 | 1941-11-15 | 1942-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-05-16 | 1945-11-15 | 1946-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-05-16 | 1949-11-15 | 1950-05-17 | $7700.00 | Window Closed / Lapsed |