US3939078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extracorporeal filter
Assignee: Purolator Technologies Inc
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Filing: 1974-04-19
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Granted: 1976-02-17
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Expires: 1994-04-19
Abstract
Abstract An extracorporeal filter having improved characteristics for the positive elimination of gas bubbles from blood streams. The top of the filter housing is sloped to a high point where there is positioned an air vent. The inlet for the blood is positioned substantially in the center of the top portion and extends past the plane of the top portion into the filter housing.
Inventors
- 👤 Francis Martin Servas
- 👤 Jorge Torres
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:46
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/36; A61M1/3621; A61M1/3627; B; B01; B01D; B01D19/00; B01D19/0031
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
124 words
An extracorporeal blood filter having improved characteristics for removing excess gas from the blood being filtered comprising a filter media mounted in a housing; said housing having a straight, smooth, uniformly sloped top surface from a low point positioned at the circumference of said housing to a high point positioned at the circumference of said housing directly opposite said low point, an inlet for the blood positioned in the top surface, a gas vent positioned at said high point, said blood inlet having a portion extending below the sloped top surface into the housing, said portion being free and open and not in contact with any other part of said filter whereby gas escaping to the vent is directed away from the entering bloodstream.
Claim 2
Dependent Claim
124 words
An extracorporeal blood filter having improved characteristics for removing excess gas from the blood being filtered comprising a filter media mounted in a housing; said housing having a straight, smooth, uniformly sloped top surface from a low point positioned at the circumference of said housing to a high point positioned at the circumference of said housing directly opposite said low point, an inlet for the blood positioned in the top surface, a gas vent positioned at said high point, said blood inlet having a portion extending below the sloped top surface into the housing, said portion being free and open and not in contact with any other part of said filter whereby gas escaping to the vent is directed away from the entering bloodstream.
Claim 3
Dependent Claim
23 words
An extracorporeal blood filter according to claim 1 wherein the blood inlet is positioned substantially in the center of the sloping top surface.
References Cited (Backward Citations)
US3701433A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-16 | 1979-08-18 | 1980-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-16 | 1983-08-18 | 1984-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-16 | 1987-08-18 | 1988-02-17 | $7700.00 | Window Closed / Lapsed |