Patent US3227280A successfully refreshed from Google Patents.
US3227280A
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Assignee: AVIS INDUSTRIAL Corp
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Filing: 1963-01-15
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Granted: 1966-01-04
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Expires: 1983-01-15
Abstract
No abstract record available.
Inventors
- 👤 Robert K Hathaway
- 👤 Jr John F Waldherr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:39
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/21; B01D29/88; B01D29/90; B01D2201/00; B01D2201/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
A FILTER ELEMENT ADAPTED TO BE CONTAINED WITHIN A TWO PART FLUID FILTER ENCLOSURE HAVING FACING SEALING SURFACES AND DEFINIG FLUID INLET AND FLUID OUTLET MEANS COMPRISING A PLEATED ANNULAR FILTER BODY HAVING LONGITUDINAL EXTENDING INNER AND OUTER PLEATS, AN IMPERFORATED CENTER TUBE DISPOSED COAXIALLY WITH SAID PLEATS AND SPACED RADIALLY INWARDLY FROM SAID INNER PLEATS TO DEFINE AN ANNULAR FLUID CHAMBER IN THE SPACE BETWEEN SAID CENTER TUBE AND SAID PLEATED ANNULAR FILTER BODY, A FIRST END CAP AFFIXED TO ONE END OF SAID FILTER BODY AND FORMING A SEAL THEREWITH, SAID FIRST END CAP BEING IN SEALING ENGAGEMENT WITH THE RESPECTIVE END OF SAID CENTER TUBE FOR CLOSING SAID FLUID CHAMBER AT SAID END, AND A SECOND END CAP AFFIXED TO THE OTHER END OF SAID FILTER BODY FOR EFFECTING A SEAL THEREWITH, SAID SECOND END CAP HAVING A PLIANT PORTION EXTENDING RADIALLY OUTWARLDY BEYOND SAID OUTER PLEATS, SAID PLIANT PORTION BEING ADAPTED TO BE ENGAGED BETWEEN THE FACING SEALING SURFACES OF THE FILTER ENCLOSURE PARTS TO FORM A SEALING GASKET
Claim 2
Dependent Claim
173 words
A FILTER ELEMENT ADAPTED TO BE CONTAINED WITHIN A TWO PART FLUID FILTER ENCLOSURE HAVING FACING SEALING SURFACES AND DEFINIG FLUID INLET AND FLUID OUTLET MEANS COMPRISING A PLEATED ANNULAR FILTER BODY HAVING LONGITUDINAL EXTENDING INNER AND OUTER PLEATS, AN IMPERFORATED CENTER TUBE DISPOSED COAXIALLY WITH SAID PLEATS AND SPACED RADIALLY INWARDLY FROM SAID INNER PLEATS TO DEFINE AN ANNULAR FLUID CHAMBER IN THE SPACE BETWEEN SAID CENTER TUBE AND SAID PLEATED ANNULAR FILTER BODY, A FIRST END CAP AFFIXED TO ONE END OF SAID FILTER BODY AND FORMING A SEAL THEREWITH, SAID FIRST END CAP BEING IN SEALING ENGAGEMENT WITH THE RESPECTIVE END OF SAID CENTER TUBE FOR CLOSING SAID FLUID CHAMBER AT SAID END, AND A SECOND END CAP AFFIXED TO THE OTHER END OF SAID FILTER BODY FOR EFFECTING A SEAL THEREWITH, SAID SECOND END CAP HAVING A PLIANT PORTION EXTENDING RADIALLY OUTWARLDY BEYOND SAID OUTER PLEATS, SAID PLIANT PORTION BEING ADAPTED TO BE ENGAGED BETWEEN THE FACING SEALING SURFACES OF THE FILTER ENCLOSURE PARTS TO FORM A SEALING GASKET
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) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |