US2683537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pleated filter element
Assignee: Fram Corp
•
Filing: 1949-06-11
•
Granted: 1954-07-13
•
Expires: 1969-06-11
Abstract
No abstract record available.
Inventors
- 👤 Dobrolet Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:07
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/52; B01D46/521; B01D46/522; B01D25/00; B01D25/02; B01D27/00; B01D27/04; B01D27/06; B01D29/00; B01D29/11; B01D29/111; B01D29/13; B01D29/15; B01D29/21; B01D46/24; B01D2201/00; B01D2201/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB494316A
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US2164966A
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US2279423A
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US2278603A
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US2358238A
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US2410371A
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GB611477A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-12 | 1958-01-11 | 1958-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-12 | 1962-01-11 | 1962-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-12 | 1966-01-11 | 1966-07-13 | $7700.00 | Window Closed / Lapsed |