US3269540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple filter devices
Assignee: Individual
•
Filing: 1963-04-22
•
Granted: 1966-08-30
•
Expires: 1983-04-22
Abstract
No abstract record available.
Inventors
- 👤 Nils O Rosaen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:03
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/50; B01D29/52; B01D29/54; B01D35/00; B01D35/14; B01D35/147; B01D35/157
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A FILTER DEVICE ADAPTED TO BE CONNECTED TO AN OUTLET PIPE AND TO BE SUBMERGED IN A FLUID RESERVOIR, SAID DEVICE COMPRISING (A) A FILTER CARRIER STRUCTURE SUBMERGED IN SAID RESERVOIR AND HAVING AN OUTLET ADAPTED FOR CONNECTION TO SAID OUTLET PIPE, (B) SAID CARRIER STRUCTURE COMPRISING A FIRST ANNULAR MEMBER AND A SECOND ANNULAR MEMBER AND A FIRST FILTER ELEMENT AND A SECOND FILTER ELEMENT CARRIED BY SAID STRUCTURE INTERMEDIATE SAID ANNULAR MEMBERS AND EACH HAVING AN INLET SIDE EXPOSED TO THE FLUID IN SAID RESERVOIR AND AN OUTLET SIDE COMMUNICATING WITH SAID OUTLET, (C) A NORMALLY CLOSED VALVE MEANS CARRIED BY SAID STRUCTURE INTERMEDIATE THE OUTLET SIDES OF SAID FILTER ELEMENTS AND OPERABLE TO REGULATE FLUID FLOW FROM THE OUTLET SIDE OF SAID SECOND FILTER ELEMENT OF THE
Claim 2
Dependent Claim
130 words
A FILTER DEVICE ADAPTED TO BE CONNECTED TO AN OUTLET PIPE AND TO BE SUBMERGED IN A FLUID RESERVOIR, SAID DEVICE COMPRISING (A) A FILTER CARRIER STRUCTURE SUBMERGED IN SAID RESERVOIR AND HAVING AN OUTLET ADAPTED FOR CONNECTION TO SAID OUTLET PIPE, (B) SAID CARRIER STRUCTURE COMPRISING A FIRST ANNULAR MEMBER AND A SECOND ANNULAR MEMBER AND A FIRST FILTER ELEMENT AND A SECOND FILTER ELEMENT CARRIED BY SAID STRUCTURE INTERMEDIATE SAID ANNULAR MEMBERS AND EACH HAVING AN INLET SIDE EXPOSED TO THE FLUID IN SAID RESERVOIR AND AN OUTLET SIDE COMMUNICATING WITH SAID OUTLET, (C) A NORMALLY CLOSED VALVE MEANS CARRIED BY SAID STRUCTURE INTERMEDIATE THE OUTLET SIDES OF SAID FILTER ELEMENTS AND OPERABLE TO REGULATE FLUID FLOW FROM THE OUTLET SIDE OF SAID SECOND FILTER ELEMENT OF THE
References Cited (Backward Citations)
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Cited
US2617535A
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US2605904A
Cited
US2868382A
Cited
US2998138A
Cited
US3120490A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-29 | 1970-02-28 | 1970-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-29 | 1974-02-28 | 1974-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-29 | 1978-02-28 | 1978-08-30 | $7700.00 | Window Closed / Lapsed |