US3308958A
Expired / Lapsed
US
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Assignee: Pall Corp
•
Filing: 1964-04-03
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Granted: 1967-03-14
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Expires: 1984-04-03
Abstract
No abstract record available.
Inventors
- 👤 Allen L Berger
- 👤 Mason Robert
- 👤 David B Pall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:03
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/21
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A FILTER ASSEMBLY COMPRISING A GENERALLY TUBULAR FILTER ELEMENT, AN INTERNAL SUPPORTING CORE DISPOSED WITHIN THE FILTER ELEMENT, SAID CORE HAVING SIDES AND ENDS WHICH EXTEND FOR A SUBSTANTIAL DISTANCE BEYOND THE EXTREME OF EACH END OF THE FILTER ELEMENT, AND END CAPS BONDED TO AND CLOSING OFF THE ENDS OF THE FILTER ELEMENT IN A FLUIDTIGHT SEAL, EACH OF SAID END CAPS HAVING A PORTION RECEIVING SAID CORE IN AXIAL ALIGNMENT THEREWITH AND CLOSELY ENCLOSING THE SIDERS AND ENDS OF THE CORE EXTENDING BEYOND THE EXTREME ENDS OF THE FILTER ELEMENT, AND ENGAGING SUCH SIDES AT A PLURALITY OF POINTS, EACH OF SAID EXTENDING SIDES OF SAID CORE FORMING GUIDE SURFACE MEANS FOR POSITIONING EACH SAID END CAP ON THE ASSEMBLY TO ALIGN SAID END CAPS WITH RESPECT TO SAID CORE AND FILTER ELEMENT.
Claim 2
Dependent Claim
135 words
A FILTER ASSEMBLY COMPRISING A GENERALLY TUBULAR FILTER ELEMENT, AN INTERNAL SUPPORTING CORE DISPOSED WITHIN THE FILTER ELEMENT, SAID CORE HAVING SIDES AND ENDS WHICH EXTEND FOR A SUBSTANTIAL DISTANCE BEYOND THE EXTREME OF EACH END OF THE FILTER ELEMENT, AND END CAPS BONDED TO AND CLOSING OFF THE ENDS OF THE FILTER ELEMENT IN A FLUIDTIGHT SEAL, EACH OF SAID END CAPS HAVING A PORTION RECEIVING SAID CORE IN AXIAL ALIGNMENT THEREWITH AND CLOSELY ENCLOSING THE SIDERS AND ENDS OF THE CORE EXTENDING BEYOND THE EXTREME ENDS OF THE FILTER ELEMENT, AND ENGAGING SUCH SIDES AT A PLURALITY OF POINTS, EACH OF SAID EXTENDING SIDES OF SAID CORE FORMING GUIDE SURFACE MEANS FOR POSITIONING EACH SAID END CAP ON THE ASSEMBLY TO ALIGN SAID END CAPS WITH RESPECT TO SAID CORE AND FILTER ELEMENT.
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) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |