USRE27701E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter frame seal
Assignee: —
•
Filing: 1972-04-17
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Granted: 1973-07-17
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Expires: 1992-04-17
Abstract
Abstract AN AIR FILTER HAVING A CHANNEL ABOUT ITS FRONT PERIPHERY WHCH IS FILLED WITH A FLUID OF RELATIVELY HIGH CONSISTENCY. THE CHANNEL IS ADAPTED TO RECEIVE A MATING RETAINER WHEN THE FILTER IS POSITIONED IN ITS SUPPORTING HOUSING, WHEREBY THE RETAINER IS FRICTIONALLY AND SEALABLY ENGAGED BY THE FLUID IN THE FILTER CHANNEL.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:24
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/52; B01D46/521; B01D46/10; F; F24; F24F; F24F13/00; F24F13/28; G; G21; G21F; G21F7/00; G21F7/02; G21F7/03; B01D2279/00; B01D2279/50; B01D2279/51
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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |