US3071915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter
Assignee: Farr Co
•
Filing: 1960-09-26
•
Granted: 1963-01-08
•
Expires: 1980-09-26
Abstract
No abstract record available.
Inventors
- 👤 Allen W Hardy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:10
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/02; F02M35/024
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A FILTER ASSEMBLY COMPRISING THE COMBINATION OF: A FIRST STAGE FILTER COMPRISING A PLURALITY OF CYCLONE FILTER UNITS; A SECOND STAGE FILTER COMPRISING A PLURALITY OF TUBULAR PLEATED FILTER ELEMENTS, A SEALING FLANGE CONNECTING SAID ELEMENTS TOGETHER AT ONE END, SAID FLANGE BEING FORMED OF A RUBBER-LIKE MATERIAL AND HAVING A PLURALITY OF OPENINGS THEREIN ALIGNED WITH THE INTERIOR OF SAID TUBULAR ELEMENTS, AND AN END WALL CONNECTING SAID ELEMENTS TOGETHER AT THE OTHER END, SAID END WALL CLOSING THE ENDS OF SAID ELEMENTS; AND EACH OF SAID CYCLONE FILTER UNITS BEING AXIALLY ALIGNED WITH ONE OF SAID OPENINGS AND ASSOCIATED TUBULAR ELEMENT WITH THE DISCHARGE OF EACH UNIT CONNECTED TO THE ALIGNED OPENING.
Claim 2
Dependent Claim
114 words
A FILTER ASSEMBLY COMPRISING THE COMBINATION OF: A FIRST STAGE FILTER COMPRISING A PLURALITY OF CYCLONE FILTER UNITS; A SECOND STAGE FILTER COMPRISING A PLURALITY OF TUBULAR PLEATED FILTER ELEMENTS, A SEALING FLANGE CONNECTING SAID ELEMENTS TOGETHER AT ONE END, SAID FLANGE BEING FORMED OF A RUBBER-LIKE MATERIAL AND HAVING A PLURALITY OF OPENINGS THEREIN ALIGNED WITH THE INTERIOR OF SAID TUBULAR ELEMENTS, AND AN END WALL CONNECTING SAID ELEMENTS TOGETHER AT THE OTHER END, SAID END WALL CLOSING THE ENDS OF SAID ELEMENTS; AND EACH OF SAID CYCLONE FILTER UNITS BEING AXIALLY ALIGNED WITH ONE OF SAID OPENINGS AND ASSOCIATED TUBULAR ELEMENT WITH THE DISCHARGE OF EACH UNIT CONNECTED TO THE ALIGNED OPENING.
References Cited (Backward Citations)
US1714854A
Cited
GB326047A
Cited
DE683132C
Cited
US2122111A
Cited
FR874986A
Cited
GB700297A
Cited
US2745513A
Cited
US2732031A
Cited
GB761710A
Cited
US2836256A
Cited
US2941620A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |