Patent US3280537A successfully refreshed from Google Patents.
US3280537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conduit gas filter assembly
Assignee: American Air Filter Co Inc
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Filing: 1965-07-08
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Granted: 1966-10-25
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Expires: 1985-07-08
Abstract
No abstract record available.
Inventors
- 👤 Willem J Hagendoorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:08
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/24; B01D46/0039; B01D46/0052; B01D46/0054
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
212 words
A GAS FILTER ASSEMBLY COMPRISING: A LONGITUDINALLY EXTENDING OUTER CYLINDRICAL CONDUIT HAVING SPACED, AXIALLY ALIGNED DIRTY GAS INLET AND CLEAN GAS OUTLET MEANS, SAID CYLINDRICAL CONDUIT INCLUDING A CONTRACTION SECTION BETWEEN SAID INLET AND OUTLET MEANS; A GAS IMPERVIOUS LONGITUDINALLY EXTENDING BAFFLE HOUSING HAVING A CYLINDRICAL PORTION AND CONICAL END PORTION DISPOSED WITHIN SAID OUTER CONDUIT IN CO-EXTENSIVE SPACED RELATIONSHIP THEREWITH WITH THE CONICAL END PORTION ALIGNED WITH AND SPACED FROM THE CONTRACTION SECTION TO PROVIDE WITHIN SAID OUTER CONDUIT A LONGITUDINALLY CO-EXTENDING ANNULAR GAS PASSAGE INCLUDING A CONTRACTING PORTION COMMUNICATING WITH SAID DIRTY GAS OUTLET AND SAID CLEAN GAS INLET; A FIRST LONGITUDINALLY EXTENDING CYLINDRICAL JACKET DISPOSED WITHIN SAID OUTER CONDUIT SURROUNDING SAID BAFFLE HOUSING ON ONE SIDE OF SAID CONTRACTION SECTION TO DEFINE A FIRST ANNULAR FILTER MEDIA CHAMBER; A SECOND LONGITUDINALLY EXTENDING CYLINDRICAL JACKET DISPOSED WITHIN SAID OUTER CONDUIT ON THE OTHER SIDE OF SAID CONTRACTION SECTION TO DEFINE A SECOND FILTER MEDIA CHAMBER SPACED FROM AN IN AXIAL ALIGNMENT WITH SAID FIRST FILTER MEDIA CHAMBER; A CYLINDRICAL UNITARY FILTER MEDIA MEMBER DISPOSED WITHIN ONE OF SAID FILTER MEDIA CHAMBERS; AND FILTER MEDIA ACTUATING MEANS TO MOVE SAID MEDIA AS A UNIT FORM ONE OF SAID MEDIA CHAMBERS TO THE OTHER ACROSS THE CONTRACTING PORTION OF SAID GAS PASSAGE.
Claim 2
Dependent Claim
212 words
A GAS FILTER ASSEMBLY COMPRISING: A LONGITUDINALLY EXTENDING OUTER CYLINDRICAL CONDUIT HAVING SPACED, AXIALLY ALIGNED DIRTY GAS INLET AND CLEAN GAS OUTLET MEANS, SAID CYLINDRICAL CONDUIT INCLUDING A CONTRACTION SECTION BETWEEN SAID INLET AND OUTLET MEANS; A GAS IMPERVIOUS LONGITUDINALLY EXTENDING BAFFLE HOUSING HAVING A CYLINDRICAL PORTION AND CONICAL END PORTION DISPOSED WITHIN SAID OUTER CONDUIT IN CO-EXTENSIVE SPACED RELATIONSHIP THEREWITH WITH THE CONICAL END PORTION ALIGNED WITH AND SPACED FROM THE CONTRACTION SECTION TO PROVIDE WITHIN SAID OUTER CONDUIT A LONGITUDINALLY CO-EXTENDING ANNULAR GAS PASSAGE INCLUDING A CONTRACTING PORTION COMMUNICATING WITH SAID DIRTY GAS OUTLET AND SAID CLEAN GAS INLET; A FIRST LONGITUDINALLY EXTENDING CYLINDRICAL JACKET DISPOSED WITHIN SAID OUTER CONDUIT SURROUNDING SAID BAFFLE HOUSING ON ONE SIDE OF SAID CONTRACTION SECTION TO DEFINE A FIRST ANNULAR FILTER MEDIA CHAMBER; A SECOND LONGITUDINALLY EXTENDING CYLINDRICAL JACKET DISPOSED WITHIN SAID OUTER CONDUIT ON THE OTHER SIDE OF SAID CONTRACTION SECTION TO DEFINE A SECOND FILTER MEDIA CHAMBER SPACED FROM AN IN AXIAL ALIGNMENT WITH SAID FIRST FILTER MEDIA CHAMBER; A CYLINDRICAL UNITARY FILTER MEDIA MEMBER DISPOSED WITHIN ONE OF SAID FILTER MEDIA CHAMBERS; AND FILTER MEDIA ACTUATING MEANS TO MOVE SAID MEDIA AS A UNIT FORM ONE OF SAID MEDIA CHAMBERS TO THE OTHER ACROSS THE CONTRACTING PORTION OF SAID GAS PASSAGE.
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) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |