Patent US3606739A successfully refreshed from Google Patents.
US3606739A
Expired / Lapsed
US
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Air filter
Assignee: Individual
•
Filing: 1969-07-10
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Granted: 1971-09-21
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Expires: 1989-07-10
Abstract
Abstract AN AIR FILTER COMPRISING A HOUSING HAVING A REMOVABLE LID AND AN INLET OPENING AND AN OUTLET OPENING. A UNITARY FILTERING MEDIUM COMPRISING A SINGLE LENGTH OF MATERIAL FORMED INTO A PLURALITY OF INDIVIDUAL BAGS IS SUPPORTED WITHIN THE HOUSING OF THE FILTER BETWEEN THE INLET OPENING AND THE OUTLET OPENING. THE UNITARY FILTERING MEDIUM IS SECURED TO AND SUPPORTED BY AN INTEGRAL FRAME MEMBER WHICH IS, IN TURN, SUPPORTED BY PORTIONS OF THE HOUSING AND MAINTAINED IN POSITION WITHIN THE HOUSING BY THE COOPERATIVE ARRANGEMENT OF THE LID OF THE HOUSING AND MEMBERS DISPOSED BETWEEN THE LID AND PERIPHERAL PORTIONS OF THE FRAME MEMBER.
Inventors
- 👤 Donald A Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:22
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/52; B01D46/521; B01D46/522; B01D46/0002; B01D46/0005; B01D46/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |