Patent US3354623A successfully refreshed from Google Patents.
US3354623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unit filter assembly
Assignee: American Air Filter Co Inc
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Filing: 1965-09-27
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Granted: 1967-11-28
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Expires: 1985-09-27
Abstract
No abstract record available.
Inventors
- 👤 Joseph R Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:17
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/10; B01D46/12; B01D46/121
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
180 words
A UNIT FILTER ASSEMBLY COMPRIISNG: AN OPEN-ENDED FRAME MEMBER HAVING AN UPSTREAM DIRTY GAS INLET AND A DOWNSTREAM CLEAN GAS OUTLET; A FIRST SET OF SPACED, LONGITUDINALLY-EXTENDING PLENUM-FORMING MEMBERS OF SUBSTANTIALLY U-SHAPED CROSS SECTION DISPOSED WITHIN SAID FRAME MEMBER, EACH HAVING A BASE PORTION EXTENDING TRANSVERSELY ACROSS SAID DIRTY GAS INLET AND HAVING PERFORATED FLANK PORTIONS EXTENDING FROM SAID DIRTY GAS INLET TOWARD SAID CLEAN GAS OUTLET; A SECOND SET OF SPACED, LONGITUDINALLY-EXTENDING PLENUM-FORMING MEMBERS OF SUBSTANTIALLY U-SHAPED CROSS SECTION DISPOSED WITHIN SAID FRAME MEMBER, EACH HAVING A BASE PORTION EXTENDING TRANSVERSELY ACROSS SAID CLEAN GAS OUTLET AND HAVING PERFORATED FLANK PORTIONS EXTENDING FROM SAID CLEAN GAS OUTLET TOWARD SAID DIRTY GAS INLET, THE FLANK PORTIONS OF SAID FIRST AND SECOND SETS HAVING INWARDLY TURNED FLANGED MEMBERS OF SMALLER EXTENT THAT SAID BASE PORTIONS ENGAGING AGAINST FLANK PORTIONS OF AN OPPOSITE SET OF PLENUMFORMING MEMBERS TO SPACE ADJACENT FLANK PORTIONS OF SAID FIRST AND SECOND SET AND FROM PERFORATED PLENUM CHAMBERS THEREBETWEEN; AND FILTER MEDIA MATERIAL DISPOSED WITHIN SAID PERFORATED PLENUM CHAMBERS IN SUFFICIENT QUANTITIES TO SUBSTANTIALLY FILL THE SAME.
Claim 2
Dependent Claim
180 words
A UNIT FILTER ASSEMBLY COMPRIISNG: AN OPEN-ENDED FRAME MEMBER HAVING AN UPSTREAM DIRTY GAS INLET AND A DOWNSTREAM CLEAN GAS OUTLET; A FIRST SET OF SPACED, LONGITUDINALLY-EXTENDING PLENUM-FORMING MEMBERS OF SUBSTANTIALLY U-SHAPED CROSS SECTION DISPOSED WITHIN SAID FRAME MEMBER, EACH HAVING A BASE PORTION EXTENDING TRANSVERSELY ACROSS SAID DIRTY GAS INLET AND HAVING PERFORATED FLANK PORTIONS EXTENDING FROM SAID DIRTY GAS INLET TOWARD SAID CLEAN GAS OUTLET; A SECOND SET OF SPACED, LONGITUDINALLY-EXTENDING PLENUM-FORMING MEMBERS OF SUBSTANTIALLY U-SHAPED CROSS SECTION DISPOSED WITHIN SAID FRAME MEMBER, EACH HAVING A BASE PORTION EXTENDING TRANSVERSELY ACROSS SAID CLEAN GAS OUTLET AND HAVING PERFORATED FLANK PORTIONS EXTENDING FROM SAID CLEAN GAS OUTLET TOWARD SAID DIRTY GAS INLET, THE FLANK PORTIONS OF SAID FIRST AND SECOND SETS HAVING INWARDLY TURNED FLANGED MEMBERS OF SMALLER EXTENT THAT SAID BASE PORTIONS ENGAGING AGAINST FLANK PORTIONS OF AN OPPOSITE SET OF PLENUMFORMING MEMBERS TO SPACE ADJACENT FLANK PORTIONS OF SAID FIRST AND SECOND SET AND FROM PERFORATED PLENUM CHAMBERS THEREBETWEEN; AND FILTER MEDIA MATERIAL DISPOSED WITHIN SAID PERFORATED PLENUM CHAMBERS IN SUFFICIENT QUANTITIES TO SUBSTANTIALLY FILL THE SAME.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-27 | 1971-05-29 | 1971-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-27 | 1975-05-29 | 1975-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-27 | 1979-05-29 | 1979-11-28 | $7700.00 | Window Closed / Lapsed |