Patent US2207902A successfully refreshed from Google Patents.
US3616618A
Expired / Lapsed
US
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Air filter gasket element
Assignee: Donaldson Co Inc
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Filing: 1969-08-13
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Granted: 1971-11-02
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Expires: 1989-08-13
Abstract
Abstract THE DISCLOSURE IS DIRECTED TO A CENTRIFUGAL AIR CLEANER HAVING A REMOVABLE FILTER ASSEMBLY THAT FITS WITHIN AN OUTER CONTAINER OF THE AIR CLEANER AND FORMS AIR PASSAGES THEREWITH. FORMING PART OF THE AIR FILTER ASSEMBLY IS A RESILIENT GASKET CASING WHICH ENCIRCLES A PART OF THE ASSEMBLY TO PROVIDE (A) AIR SEALING FUNCTION BETWEEN THE ASSEMBLY AND THE OUTER CONAINER, (B) AN INWARDLY EXTENDING BAFFLE TO PREVENT CENTRIFUGALLY COLLECTED DUST FROM ENTERING THE AIR FILTER, AND (C) A HANDLE EXTENDING OUTWARDLY FROM THE AIR CLEANER TO FACILITATE REMOVAL OF THE AIR FILTER ASSEMBLY FOR INSPECTION AND CLEANING.
Inventors
- 👤 Donald D Gronholz
- 👤 Delmer L Radeztsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:06
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/24; B01D46/2403; B01D46/2411; B01D46/42; B01D46/48; B01D46/88; B01D50/00; B01D50/20; B01D2265/00; B01D2265/02; B01D2265/024; B01D2271/00; B01D2271/02; Y; Y10; Y10S; Y10S55/00; Y10S55/28
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) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |