Patent US3262572A successfully refreshed from Google Patents.
US3262572A
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Separator-filter
Assignee: Purolator Products Inc
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Filing: 1963-05-27
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Granted: 1966-07-26
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Expires: 1983-05-27
Abstract
No abstract record available.
Inventors
- 👤 Clayton A Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:07
CPC Classifications
B; B01; B01D; B01D36/00; B01D36/003; B01D17/00; B01D17/02; B01D17/04; B01D17/045; B01D17/08; B01D17/10; B01D29/00; B01D29/11; B01D29/111; B01D29/13; B01D29/15; B01D29/21; B01D29/23; B01D29/232; B01D29/50; B01D29/56; B01D29/58; B01D29/88; B01D29/90; Y; Y10; Y10S; Y10S210/00; Y10S210/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A SEPARATOR-FILTER FOR LIQUIDS COMPRISING A ONE-CHAMBER CASING HAVING A INTERIOR PROJECTION NEAR ITS LOWER END, A DRAIN OPENING THEREBELOW, AN INLET AND AN OUTLET; AND A REPLACEABLE FILTER CARTRIDGE HOUSED THEREIN THAT MAKES LIQUID TIGHT ENGAGEMENT WITH SAID INTERIOR PROJECTION AND SEALS OFF THE LOWER PART OF THE CASING CHAMBER AS A SUMP AND DIVIDES THE MAIN PORTION OF THE CHAMBER INTO THREE COMPARTMENTS THAT COMMUNICATE RESPECTIVELY WITH SAID INLET, SEALED OFF SUMP AND OUTLET, SAID CARTRIDGE HAVING SPACED ANNULAR UPPER AND LOWER END CAPS AND A PAIR OF ANNULAR FILTERS IN SPACED CONCENTRIC RELATION SECURED THEREBETWEEN IN LEAK-PROOF RELATION THAT SERVE TO DIVIDE THE COMPARTMENTS, ONE OF WHICH LIES WITHIN THE INNER ANNULUS, A SECOND BETWEEN THE TWO ANNULI AND THE OTHER BETWEEN THE OUTER ANNULUS AND THE CASING.
Claim 2
Dependent Claim
131 words
A SEPARATOR-FILTER FOR LIQUIDS COMPRISING A ONE-CHAMBER CASING HAVING A INTERIOR PROJECTION NEAR ITS LOWER END, A DRAIN OPENING THEREBELOW, AN INLET AND AN OUTLET; AND A REPLACEABLE FILTER CARTRIDGE HOUSED THEREIN THAT MAKES LIQUID TIGHT ENGAGEMENT WITH SAID INTERIOR PROJECTION AND SEALS OFF THE LOWER PART OF THE CASING CHAMBER AS A SUMP AND DIVIDES THE MAIN PORTION OF THE CHAMBER INTO THREE COMPARTMENTS THAT COMMUNICATE RESPECTIVELY WITH SAID INLET, SEALED OFF SUMP AND OUTLET, SAID CARTRIDGE HAVING SPACED ANNULAR UPPER AND LOWER END CAPS AND A PAIR OF ANNULAR FILTERS IN SPACED CONCENTRIC RELATION SECURED THEREBETWEEN IN LEAK-PROOF RELATION THAT SERVE TO DIVIDE THE COMPARTMENTS, ONE OF WHICH LIES WITHIN THE INNER ANNULUS, A SECOND BETWEEN THE TWO ANNULI AND THE OTHER BETWEEN THE OUTER ANNULUS AND THE CASING.
References Cited (Backward Citations)
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US2507125A
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US2864505A
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US3019904A
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US3228527A
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US3187895A
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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) | 1969-07-25 | 1970-01-24 | 1970-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-25 | 1974-01-24 | 1974-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-25 | 1978-01-24 | 1978-07-26 | $7700.00 | Window Closed / Lapsed |