Patent US2313307A successfully refreshed from Google Patents.
US2313307A
Expired / Lapsed
US
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Connector for sections of filter cartridges
Assignee: Fram Corp
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Filing: 1939-11-25
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Granted: 1943-03-09
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Expires: 1959-11-25
Abstract
No abstract record available.
Inventors
- 👤 James W Wilkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:17
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/114; B01D29/50; B01D29/52; B01D29/54; B01D2201/00; B01D2201/40; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/4987; Y10T29/49872; Y10T29/49945; Y10T403/00; Y10T403/55; Y10T403/557
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) | 1946-03-08 | 1946-09-07 | 1947-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-03-08 | 1950-09-07 | 1951-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-03-08 | 1954-09-07 | 1955-03-09 | $7700.00 | Window Closed / Lapsed |