Patent US2719363A successfully refreshed from Google Patents.
US5152905A
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US
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Method for processing blood for human transfusion
Assignee: Pall Corp
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Filing: 1990-11-06
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Granted: 1992-10-06
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Expires: 2010-11-06
Abstract
Abstract The invention discloses a method for treating blood comprising (a) centrifuging blood and (b) passing a supernatant layer of the centrifuged blood through a porous medium until red blood cells block the porous medium.
Inventors
- 👤 David B. Pall
- 👤 Thomas C. Gsell
- 👤 Brian T. Muellers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:00
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/02; A61M1/0209; A61M1/0218; A61M1/36; A61M1/3621; A61M1/3627; A61M1/3633; B; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/1607; B01D39/1623; A61M2202/00; A61M2202/04; A61M2202/0413; A61M2202/0427; A61M2202/0429; A61M2202/0439
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
31 words
A method for treating whole blood comprising a. centrifuging whole blood; and b. passing a supernatant layer of the centrifuged blood through a filter until red blood cells block the filter.
Claim 2
Independent Claim
31 words
A method for treating whole blood comprising a. centrifuging whole blood; and b. passing a supernatant layer of the centrifuged blood through a filter until red blood cells block the filter.
Claim 3
Independent Claim
38 words
A method for treating blood comprising: centrifuging blood to form a supernatant layer and a sediment layer; and passing the supernatant layer of the centrifuged blood through a porous medium until red blood cells block the porous medium.
Claim 4
Independent Claim
38 words
A method for treating blood comprising: centrifuging blood to form a supernatant layer and a sediment layer; and passing the supernatant layer of the centrifuged blood through a porous medium until red blood cells block the porous medium.
Claim 5
Dependent Claim
26 words
The method of claim 2 wherein passing the supernatant layer of the centrifuged blood through a porous medium further comprises depleting leukocytes from the supernatant layer.
Claim 6
Dependent Claim
16 words
The method of claim 2 further comprising collecting the supernatant layer passing through the porous medium.
Claim 7
Dependent Claim
30 words
The method of claim 2 wherein centrifuging blood to form a supernatant layer and a sediment layer comprises centrifuging whole blood to form a PRP layer and a PRC layer.
Claim 8
Dependent Claim
32 words
The method of claim 5 further comprising passing the PRP layer through a porous medium that passes PRP but blocks red blood cells, and collecting the PRP passing through the porous medium.
Claim 9
Dependent Claim
40 words
The method of claim 5 further comprising passing the PRP layer through a porous medium that depletes leukocytes from the PRP and passes PRP but blocks red blood cells, and collecting the leukocyte depleted PRP passing through the porous medium.
Claim 10
Dependent Claim
23 words
The method of claim 2 wherein passing the supernatant layer through a porous medium comprises passing the supernatant layer through a fibrous medium.
Claim 11
Dependent Claim
28 words
The method of claim 8 wherein passing the supernatant layer through a fibrous medium comprises passing the supernatant layer through a fibrous medium comprising modified polybutylene terephthalate fibers.
Claim 12
Dependent Claim
37 words
The method of claim 9 wherein passing the supernatant layer through a fibrous medium comprising modified polybutylene terephthalate fibers comprises passing the supernatant layer through a fibrous medium having a CWST of at least about 70 dynes/cm.
Claim 13
Dependent Claim
38 words
The method of claim 8 wherein passing the supernatant layer through a fibrous medium comprises passing the supernatant layer through a fibrous medium of fibers having a surface area of about 0.04 to about 2.0 M 2 .
Claim 14
Dependent Claim
33 words
The method of claim 8 wherein passing the supernatant layer through a fibrous medium comprises passing the supernatant layer through a fibrous medium having a density of about 0.23 to about 0.40 g/cc.
Claim 15
Independent Claim
24 words
A method for treating blood comprising: passing platelets suspended in plasma through a porous medium, and blocking the porous medium with red blood cells.
Claim 16
Independent Claim
24 words
A method for treating blood comprising: passing platelets suspended in plasma through a porous medium, and blocking the porous medium with red blood cells.
References Cited (Backward Citations)
US3513976A
Cited
US4040959A
Cited
US4111199A
Cited
US4330410A
Cited
US4187979A
Cited
US4608178A
Cited
US4447220A
Cited
US4416777A
Cited
US4322298A
Cited
US4464167A
Cited
US4687580A
Cited
US4596657A
Cited
US4919823A
Cited
US4767541A
Cited
US4680025A
Cited
US4663058A
Cited
US4747952A
Cited
US4675117A
Cited
US4663032A
Cited
US4776964A
Cited
EP0267286A1
Cited
US4810378A
Cited
US4855063A
Cited
US4915848A
Cited
US4720284A
Cited
US4923620A
Cited
US4925572A
Cited
US4880548A
Cited
US4985153A
Cited
US4943287A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-10-06 | 1996-04-06 | 1996-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-06 | 2000-04-06 | 2000-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-06 | 2004-04-06 | 2004-10-06 | $7700.00 | Window Closed / Lapsed |