Patent US3122501A successfully refreshed from Google Patents.
US3122501A
Expired / Lapsed
US
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Fuel filter
Assignee: Purolator Products Inc
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Filing: 1960-09-01
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Granted: 1964-02-25
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Expires: 1980-09-01
Abstract
No abstract record available.
Inventors
- 👤 William H Hultgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:05
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/30; B01D29/00; B01D29/11; B01D29/114; B01D2201/00; B01D2201/30; B01D2201/301; B01D2201/302; B01D2201/304
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A FLUID FILTER INCLUDING A CASING HAVING AN INLET PASSAGE AND AN OUTLET PASSAGE, A FILTER ELEMENT, AND MEANS FOR MOUNTING SAID ELEMENT INSIDE OF SAID CASING WITH THE LATTER DEFINING A SPACE FOR CONFINING A FLUID FLOW FOR PASSAGE THROUGH THE ELEMENT AND WHICH COLLECTS MATERIAL FILTERED FROM THE FLUID BY THE ELEMENT, SAID CASING BEING MADE OF MATERIAL THAT IS TRANSPARENT BUT ONLY WHEN TOO THIN TO BY ITSELF RESIST COLLAPSING PRESSURE, SAID CASING HAVING A PLURALITY OF INTERSPACED PROJECTIONS EXTENDING FROM ITS INSIDE TO LOCATIONS WHERE THEIR INNER ENDS ENGAGE SAID ELEMENT AND ARE BRACED THEREBY TO RESIST COLLAPSE OF SAID
Claim 2
Dependent Claim
104 words
A FLUID FILTER INCLUDING A CASING HAVING AN INLET PASSAGE AND AN OUTLET PASSAGE, A FILTER ELEMENT, AND MEANS FOR MOUNTING SAID ELEMENT INSIDE OF SAID CASING WITH THE LATTER DEFINING A SPACE FOR CONFINING A FLUID FLOW FOR PASSAGE THROUGH THE ELEMENT AND WHICH COLLECTS MATERIAL FILTERED FROM THE FLUID BY THE ELEMENT, SAID CASING BEING MADE OF MATERIAL THAT IS TRANSPARENT BUT ONLY WHEN TOO THIN TO BY ITSELF RESIST COLLAPSING PRESSURE, SAID CASING HAVING A PLURALITY OF INTERSPACED PROJECTIONS EXTENDING FROM ITS INSIDE TO LOCATIONS WHERE THEIR INNER ENDS ENGAGE SAID ELEMENT AND ARE BRACED THEREBY TO RESIST COLLAPSE OF SAID
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) | 1967-02-24 | 1967-08-26 | 1968-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-24 | 1971-08-26 | 1972-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-24 | 1975-08-26 | 1976-02-25 | $7700.00 | Window Closed / Lapsed |