Patent US4490254A successfully refreshed from Google Patents.
US4490254A
Expired / Lapsed
US
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Blood filter
Assignee: Jostra Bentley Inc
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Filing: 1980-02-25
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Granted: 1984-12-25
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Expires: 2000-02-25
Abstract
Abstract This invention relates to a blood filter assembly in which blood enters at the bottom end of the assembly, is directed in spirally upward path and then passes through a filter medium. After passing through the filter medium, the blood flows downwardly out of an outlet in the bottom end of the assembly. A gas vent is provided at the top end of the assembly. In its preferred embodiment, the outer shell of the assembly tapers from the bottom end to a narrower diameter top end, the filter medium is generally shaped in the form of a cylindrical tube and a core member is provided radially inwardly of said filter medium and spaced therefrom. This filter assembly is particularly useful for the removal of particulate matter, gas and other foreign materials from blood.
Inventors
- 👤 Lucas S. Gordon
- 👤 Karl M. Sutherland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:40
CPC Classifications
B; B01; B01D; B01D36/00; B01D36/001; A; A61; A61M; A61M1/00; A61M1/36; A61M1/3621; A61M1/3627; B01D27/00; B01D27/04; B01D27/06; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/21; B01D29/88; B01D29/90; B01D29/908
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
97 words
Blood filter assembly comprising: a. a shell having a first top end and a second bottom end, b. a blood inlet located in the region of said bottom end and opening into said bottom end, c. a blood outlet located in the region of said bottom end, d. a gas vent located in the region of said top end, and e. a blood filter medium located between said blood inlet and said blood outlet, said blood inlet being located and configured in a manner capable of directing incoming blood in a generally spiral path within said shell.
Claim 2
Dependent Claim
97 words
Blood filter assembly comprising: a. a shell having a first top end and a second bottom end, b. a blood inlet located in the region of said bottom end and opening into said bottom end, c. a blood outlet located in the region of said bottom end, d. a gas vent located in the region of said top end, and e. a blood filter medium located between said blood inlet and said blood outlet, said blood inlet being located and configured in a manner capable of directing incoming blood in a generally spiral path within said shell.
Claim 3
Dependent Claim
22 words
The assembly of claim 1 wherein said shell is tubular in shape and said filter medium is generally tubular in a shape.
Claim 4
Dependent Claim
22 words
The assembly of claim 2 where said shell tapers from a wider diameter bottom end to a more narrow diameter top end.
Claim 5
Dependent Claim
20 words
The assembly of claim 3 wherein a core member is provided radially inwardly from and spaced from said filter medium.
Claim 6
Dependent Claim
14 words
The assembly of claim 3 wherein said filter medium is generally cylindrical in shape.
Claim 7
Dependent Claim
21 words
The assembly of claim 1 wherein said filter medium comprises a woven filter material sandwiched between layers of stiff netting material.
Claim 8
Dependent Claim
11 words
The assembly of claim 6 wherein said filter medium is pleated.
Claim 9
Dependent Claim
31 words
The assembly of claim 1 wherein the space between said shell and said filter medium gradually decreases from the region of the bottom end to the region of the top end.
References Cited (Backward Citations)
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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) | 1987-12-25 | 1988-06-25 | 1988-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-25 | 1992-06-25 | 1992-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-25 | 1996-06-25 | 1996-12-25 | $7700.00 | Window Closed / Lapsed |