US3719281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple application sealing means for fluid filters
Assignee: Tenneco Inc
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Filing: 1971-04-12
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Granted: 1973-03-06
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Expires: 1991-04-12
Abstract
Abstract DISPOSABLE SPIN-ON FLUID FUEL FILTER ASSEMBLIES ARE MADE ADAPTABLE TO FUEL FILTER BASES HAVING THREADED ATTACHMENT POSTS OF VARYING DIAMETERS AND LENGTHS BY PROVIDING THE FILTER ELEMENT WITH RESILIENT SELF-CENTERING SEALING MEANS IMMEDIATELY ADJACENT THE END OF THE THREADED ATTACHMENT POST. UPON INSTALLATION OF THE FILTER ASSEMBLY ONTO A SUITABLE FILTER BASE THE CONICAL SEAL IS FORCED INTO THE MAINTAINED IN SEALING ENGAGEMENT WITH THE END OF THE ATTACHMENT POST BY THE ELEMENT HOLD-DOWN SPRING NORMALLY PROVIDED IN SPIN-ON FILTER ASSEMBLIES.
Inventors
- 👤 J Dieringer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:08
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/30; B01D35/306; B01D27/00; B01D27/04; B01D27/06; B01D27/08; B01D2201/00; B01D2201/34; Y; Y10; Y10S; Y10S210/00; Y10S210/17
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |