US3083832A
Expired / Lapsed
US
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Assignee: Walker Manufacturing Co
•
Filing: 1959-05-07
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Granted: 1963-04-02
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Expires: 1979-05-07
Abstract
No abstract record available.
Inventors
- 👤 Robert K Hathaway
- 👤 Jr Edward C Seils
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:45
CPC Classifications
B; B01; B01D; B01D27/00; B01D27/10; B01D27/103; B01D27/106; Y; Y10; Y10S; Y10S210/00; Y10S210/17
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
149 words
IN A THROW-AWAY TYPE FILTER DEVICE, A HOUSING, A BASE PLATE CLOSING ONE END OF THE HOUSING AND HAVING AN INLET AND AN OUTLET FOR THE FLOW OF FLUID TO THE DEVICE, A FILTER ELEMENT MOUNTED WITHIN THE HOUSING, A MEMBER ENGAGED BY SAID FILTER ELEMENT AND ENGAGING SAID BASE PLATE AND ACTING TO SPACE THE BOTTOM OF THE FILTER ELEMENT FROM THE BASE PLATE, SAID MEMBER INCLUDING AN APERTURE IN THE PATH OF FLOW OF FLUID FROM THE INLET TO THE OUTLET OF THE FILTER DEVICE, A RESILIENT RING IN THE PATH OF FLOW OF FLUID BENEATH SAID FILTER ELEMENT IN A DIRECTION TO BY-PASS SAID FILTER ELEMENT, AND COMPRISING A RESILIENT RING SUPPORTED BY SAID BASE PLATE AND HAVING INNER AND OUTER ELASTICALLY MOVABLE PERIPHERIES, ONE OF SAID PERIPHERIES CONTROLLING BACK FLOW THROUGH SAID BASE PLATE INLET AND THE OTHER CONTROLLING BYPASS FLOW THROUGH SAID MEMBER APERTURE.
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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) | 1966-04-01 | 1966-10-01 | 1967-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-01 | 1970-10-01 | 1971-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-01 | 1974-10-01 | 1975-04-02 | $7700.00 | Window Closed / Lapsed |