Patent US2731183A successfully refreshed from Google Patents.
US2731183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Making oil filter cartridges
Assignee: Individual
•
Filing: 1952-03-14
•
Granted: 1956-01-17
•
Expires: 1972-03-14
Abstract
No abstract record available.
Inventors
- 👤 Ernest C Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:42
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/111; B01D29/13; B01D29/15; B01D29/21; B01D29/216; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/4987; Y10T29/49872; Y10T29/53; Y10T29/53657; Y10T83/00; Y10T83/202; Y10T83/2022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2086375A
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US1454049A
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US1529701A
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US1690954A
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US2141903A
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US2311736A
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US2361783A
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US2421704A
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US2381184A
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US2537898A
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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) | 1959-01-16 | 1959-07-18 | 1960-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-16 | 1963-07-18 | 1964-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-16 | 1967-07-18 | 1968-01-17 | $7700.00 | Window Closed / Lapsed |