US3344925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic liner for oil filter
Assignee: Individual
•
Filing: 1964-08-28
•
Granted: 1967-10-03
•
Expires: 1984-08-28
Abstract
No abstract record available.
Inventors
- 👤 William A Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:27
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/30; B01D35/31; B01D2201/00; B01D2201/30; B01D2201/307
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
117 words
THE COMBINATION OF AN INTERNAL COMBUSTION ENGINE OIL FILTER HOUSING HAVING A SIDE INLET OPENING AND AN AXIAL OUTLET; AN APERTURED TUBE FIXED AXIALLY OF SAID HOUSING AND COMMUNINCATING WITH SAID OUTLET; A FILTER CARTRIDGE IN SAID HOUSING AND SUPPORTED ON SAID TUBE; A HOUSING LINER ENTIRELY SURROUNDING SIDES AND BOTTOM OF SAID CARTRIDGE AND CONFORMING GENERALLY WITH THE INTERIOR OF SAID HOUSING; SAID LINER HAVING A SIDE INLET OPENING ALIGNED WITH SAID SIDE INLET OPENING OF THE HOUSING; AND SAID LINER HAVING AN AXIALLY APERTURED, EXPANSIBLE NECK TIGHTLY EMBRACING SAID TUBE, SAID NECK BEING RESILIENT AND NORMALLY SELF-CLOSING, SO THAT THE NECK IS CLOSED WHEN THE LINER IS LIFTED FROM THE HOUSING THUS RETAINING ACCUMULATED SLUDGE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |