Patent US3272192A successfully refreshed from Google Patents.
US3272192A
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Assignee: Walker Manufacturing Co
•
Filing: 1964-05-04
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Granted: 1966-09-13
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Expires: 1984-05-04
Abstract
No abstract record available.
Inventors
- 👤 Richard V Jensen
- 👤 Robert J Offer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:44
CPC Classifications
F; F01; F01M; F01M13/00; F01M13/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
IN A FILTER DEVICE A FILTER HOUSING COMPRISING A PAIR OF CUP-SHAPED SHELL SECTIONS, SAID SHELL SECTIONS BEING JOINED TOGETHER IN AN AIR-TIGHT JOINT, THE OUTER ENDS OF SAID SHELL SECTIONS BEING NECKED DOWN AND FORMING REDUCED DIAMETER INLET AND OUTLET SECTIONS, A CYLINDRICAL FILTER ELEMENT IN ONE OF SAID SHELL SECTIONS, SAID FILTER ELEMENT BEING FORMED WITH A GENERALLY CONCAVE END ADJACENT SAID OUTLET SECTION, AND AN ANNULAR PERFORATE SUPPORT PLATE SUPPORTING SAID FILTER ELEMENT IN SAID HOUSING IN A POSITION CONFRONTING SAID OUTLET SECTION, SAID SUPPORT PLATE BEING DOME-SHAPED AND BEING NESTED WITHIN SAID CONCAVE END OF SAID FILTER ELEMENT.
Claim 2
Dependent Claim
102 words
IN A FILTER DEVICE A FILTER HOUSING COMPRISING A PAIR OF CUP-SHAPED SHELL SECTIONS, SAID SHELL SECTIONS BEING JOINED TOGETHER IN AN AIR-TIGHT JOINT, THE OUTER ENDS OF SAID SHELL SECTIONS BEING NECKED DOWN AND FORMING REDUCED DIAMETER INLET AND OUTLET SECTIONS, A CYLINDRICAL FILTER ELEMENT IN ONE OF SAID SHELL SECTIONS, SAID FILTER ELEMENT BEING FORMED WITH A GENERALLY CONCAVE END ADJACENT SAID OUTLET SECTION, AND AN ANNULAR PERFORATE SUPPORT PLATE SUPPORTING SAID FILTER ELEMENT IN SAID HOUSING IN A POSITION CONFRONTING SAID OUTLET SECTION, SAID SUPPORT PLATE BEING DOME-SHAPED AND BEING NESTED WITHIN SAID CONCAVE END OF SAID FILTER ELEMENT.
References Cited (Backward Citations)
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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) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |