Patent US3354622A successfully refreshed from Google Patents.
US3354622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unit filter assembly
Assignee: American Air Filter Co Inc
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Filing: 1965-08-02
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Granted: 1967-11-28
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Expires: 1985-08-02
Abstract
No abstract record available.
Inventors
- 👤 Jr David J Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:56
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/10; B01D46/12; B01D46/121
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A UNIT FILTER ASSEMBLY COMPRISING: AN OPEN-ENDED FRAME MEMBER HAVING AN UPSTREAM DIRTY GAS INLET AND A DOWNSTREAM CLEAN GAS OUTLET; A FIRST SET OF SPACED PARALLEL SUPPORT BARS EXTENDING TRANSVERSELY ACROSS SAID DIRTY GAS INLET; A SECOND SET OF SPACED PARALLEL SUPPORT BARS EXTENDING TRANSVERSELY ACROSS SAID CLEAN GAS OUTLET IN OFFSET RELATION TO SAID FIRST SET OF SUPPORT BARS; A FIRST SET OF LONGITUDINALLY-EXTENDING PLENUM-FORMING MEMBERS OF SUBSTANTIALLY U-SHAPED CROSS SECTION, EACH HAVING ITS BASE PORTION CO-EXTENSIVE WITH AND SURROUNDING ONE OF SAID FIRST SET OF SUPPORT BARS, SAID FIRST SET OF PLENUM-FORMING MEMBERS HAVING PERFORATED FLANK PORTIONS EXTENDING FROM SAID DIRTY GAS INLET TOWARD SAID CLEAN GAS OUTLET WITH THE ENDS THEREOF ABUTTING THE FACES OF SAID SECOND SET OF SUPPORT BARS; A SECOND SET OF LONGITUDINALLY-EXTENDING PLENUM-FORMING MEMBERS OF SUBSTANTIALLY U-SHAPED CROSS SECTION, EACH HAVING ITS BASE PORTION CO-EXTENSIVE WITH AND
Claim 2
Dependent Claim
145 words
A UNIT FILTER ASSEMBLY COMPRISING: AN OPEN-ENDED FRAME MEMBER HAVING AN UPSTREAM DIRTY GAS INLET AND A DOWNSTREAM CLEAN GAS OUTLET; A FIRST SET OF SPACED PARALLEL SUPPORT BARS EXTENDING TRANSVERSELY ACROSS SAID DIRTY GAS INLET; A SECOND SET OF SPACED PARALLEL SUPPORT BARS EXTENDING TRANSVERSELY ACROSS SAID CLEAN GAS OUTLET IN OFFSET RELATION TO SAID FIRST SET OF SUPPORT BARS; A FIRST SET OF LONGITUDINALLY-EXTENDING PLENUM-FORMING MEMBERS OF SUBSTANTIALLY U-SHAPED CROSS SECTION, EACH HAVING ITS BASE PORTION CO-EXTENSIVE WITH AND SURROUNDING ONE OF SAID FIRST SET OF SUPPORT BARS, SAID FIRST SET OF PLENUM-FORMING MEMBERS HAVING PERFORATED FLANK PORTIONS EXTENDING FROM SAID DIRTY GAS INLET TOWARD SAID CLEAN GAS OUTLET WITH THE ENDS THEREOF ABUTTING THE FACES OF SAID SECOND SET OF SUPPORT BARS; A SECOND SET OF LONGITUDINALLY-EXTENDING PLENUM-FORMING MEMBERS OF SUBSTANTIALLY U-SHAPED CROSS SECTION, EACH HAVING ITS BASE PORTION CO-EXTENSIVE WITH AND
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 |