US3278030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supercharged filter unit
Assignee: Rosaen Filter Co
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Filing: 1962-09-17
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Granted: 1966-10-11
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Expires: 1982-09-17
Abstract
No abstract record available.
Inventors
- 👤 Nils O Rosaen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:59
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/26; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/3127; Y10T137/8593; Y10T137/85978; Y10T137/86035; Y10T137/86043
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
72 words
A FLUID FILTERING SYSTEM COMPRISING (A) A PRESSURE SEALED FLUID RESERVOIR, (B) A PUMP HAVING AN OUTLET ADAPTED TO BE CONNECTED TO A FLUID USER AND AN INLET, (C) A FLUID FILTERING DEVICE CONNECTED INTERMEDIATE SAID RESERVOIR AND SAID INLET, (D) MEANS SENSING CHANGES IN THE PRESSURE DIFFERENTIAL ACROSS SAID FILTERING DEVICE, AND (E) MEANS AUTOMATICALLY OPERABLE TO INCREASE THE PRESSURE IN SAID RESERVOIR UPON SAID PRESSURE DIFFERENTIAL REACHING A PREDETERMINED VALUE.
Claim 2
Dependent Claim
72 words
A FLUID FILTERING SYSTEM COMPRISING (A) A PRESSURE SEALED FLUID RESERVOIR, (B) A PUMP HAVING AN OUTLET ADAPTED TO BE CONNECTED TO A FLUID USER AND AN INLET, (C) A FLUID FILTERING DEVICE CONNECTED INTERMEDIATE SAID RESERVOIR AND SAID INLET, (D) MEANS SENSING CHANGES IN THE PRESSURE DIFFERENTIAL ACROSS SAID FILTERING DEVICE, AND (E) MEANS AUTOMATICALLY OPERABLE TO INCREASE THE PRESSURE IN SAID RESERVOIR UPON SAID PRESSURE DIFFERENTIAL REACHING A PREDETERMINED VALUE.
Claim 3
Independent Claim
63 words
A METHOD OF SUPERCHARGING A FLUID FILTERING SYSTEM HAVING A PRESSURE SEALED RESERVOIR, A PUMP CONNECTED TO SAID RESERVOIR, AND A FILTER DEVICE CONNECTED INTERMEDIATE SAID PUMP AND SAID RESERVOIR, SAID METHOD COMPRISING (A) SENSING THE CHANGES IN PRESSURE DIFFERENTIAL ACROSS SAID FILTER DEVICE, AND (B) INCREASING THE PRESSURE IN SAID PRESSURE SEALED RESERVOIR WHEN SAID PRESSURE DIFFERENTIAL HAS REACHED A PREDETERMINED VALUE.
Claim 4
Independent Claim
63 words
A METHOD OF SUPERCHARGING A FLUID FILTERING SYSTEM HAVING A PRESSURE SEALED RESERVOIR, A PUMP CONNECTED TO SAID RESERVOIR, AND A FILTER DEVICE CONNECTED INTERMEDIATE SAID PUMP AND SAID RESERVOIR, SAID METHOD COMPRISING (A) SENSING THE CHANGES IN PRESSURE DIFFERENTIAL ACROSS SAID FILTER DEVICE, AND (B) INCREASING THE PRESSURE IN SAID PRESSURE SEALED RESERVOIR WHEN SAID PRESSURE DIFFERENTIAL HAS REACHED A PREDETERMINED VALUE.
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) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |