Patent US3154487A successfully refreshed from Google Patents.
US3154487A
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Dual fluid filters
Assignee: FRAMO CORP
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Filing: 1962-11-16
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Granted: 1964-10-27
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Expires: 1982-11-16
Abstract
No abstract record available.
Inventors
- 👤 Donald I Thornton
- 👤 Jr Chester A Vander Pyl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:09
CPC Classifications
B; B67; B67D; B67D7/00; B67D7/06; B67D7/76; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/21; B01D29/50; B01D29/52; B01D29/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A DUAL FLUID FILTER FOR FILTERING SEPARATELY THEREIN TWO DIFFERENT FLUIDS; SAID FILTER COMPRISING AN ELONGATED FILTER HOUSING HAVING AT ONE END THEREOF TWO SEPARATE INLETS, ONE OF WHICH SURROUNDS THE OTHER, AND HAVING AT THE OTHER END THEREOF TWO SEPARATE OUTLETS, ONE OF WHICH SURROUNDS THE OTHER, TWO FILTER CARTRIDGES IN SAID HOUSING IN END-TO-END AXIAL ALIGNMENT WITH EACH OTHER, ONE CARTRIDGE FOR EACH OF SAID TWO DIFFERENT FLUIDS, TUBULAR MEANS IN SAID HOUSING FOR DELIVERING A FIRST FLUID FROM A FIRST ONE OF SAID INLETS TO A FIRST ONE OF SAID CARTRIDGES TO PASS THERETHROUGH AND THEN TO A FIRST ONE OF SAID OUTLETS AND
Claim 2
Dependent Claim
107 words
A DUAL FLUID FILTER FOR FILTERING SEPARATELY THEREIN TWO DIFFERENT FLUIDS; SAID FILTER COMPRISING AN ELONGATED FILTER HOUSING HAVING AT ONE END THEREOF TWO SEPARATE INLETS, ONE OF WHICH SURROUNDS THE OTHER, AND HAVING AT THE OTHER END THEREOF TWO SEPARATE OUTLETS, ONE OF WHICH SURROUNDS THE OTHER, TWO FILTER CARTRIDGES IN SAID HOUSING IN END-TO-END AXIAL ALIGNMENT WITH EACH OTHER, ONE CARTRIDGE FOR EACH OF SAID TWO DIFFERENT FLUIDS, TUBULAR MEANS IN SAID HOUSING FOR DELIVERING A FIRST FLUID FROM A FIRST ONE OF SAID INLETS TO A FIRST ONE OF SAID CARTRIDGES TO PASS THERETHROUGH AND THEN TO A FIRST ONE OF SAID OUTLETS AND
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-27 | 1968-04-27 | 1968-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-27 | 1972-04-27 | 1972-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-27 | 1976-04-27 | 1976-10-27 | $7700.00 | Window Closed / Lapsed |