US5316674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for processing blood for human transfusion
Assignee: Pall Corp
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Filing: 1992-08-21
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Granted: 1994-05-31
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Expires: 2012-08-21
Abstract
Abstract A device for processing donated blood comprises a porous medium interposed between the collection bag and a satellite bag into which a component separated by centrifugation can be expressed, the filter element preferably having a CWST of about 70 to about 115 dynes/cm. The porous medium blocks red blood cells, but allows platelets to pass therethrough.
Inventors
- 👤 David B. Pall
- 👤 Thomas C. Gsell
- 👤 Brian T. Muellers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:21
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/1607; B01D39/1623; A; A61; A61M; A61M1/00; A61M1/02; A61M1/0209; A61M1/0218; A61M1/36; A61M1/3621; A61M1/3627; A61M1/3633; A61M2202/00; A61M2202/04; A61M2202/0413; A61M2202/0427; A61M2202/0429; A61M2202/0439
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
59 words
A device for the collection and processing of a blood product comprising a first container and at least one second container connected thereto, wherein a porous medium barring passage of red blood cells is interposed between the first container and the second container, the porous medium permitting platelets to pass therethrough until red blood cells block the porous medium.
Claim 2
Independent Claim
59 words
A device for the collection and processing of a blood product comprising a first container and at least one second container connected thereto, wherein a porous medium barring passage of red blood cells is interposed between the first container and the second container, the porous medium permitting platelets to pass therethrough until red blood cells block the porous medium.
Claim 3
Dependent Claim
22 words
The device of claim 1 wherein the fibers of the porous medium have been modified to present hydroxyl groups and carboxyl groups.
Claim 4
Dependent Claim
30 words
The device of claim 2 wherein an acid/acrylate monomer weight ratio in the modifying mixture used to provide hydroxyl groups and carboxyl groups is between about 0.01:1 and about 0.5:1.
Claim 5
Dependent Claim
17 words
The device of claim 3 wherein the CWST of the fibers is at least about 70 dynes/cm.
Claim 6
Dependent Claim
13 words
The device of claim 1 wherein the porous medium comprises polybutylene terephthalate fibers.
Claim 7
Dependent Claim
33 words
A filter element for processing a blood product comprising a porous, fibrous medium which removes leucocytes and permits platelets suspended in plasma to pass therethrough until red blood cells block the fibrous medium.
Claim 8
Dependent Claim
33 words
A filter element for processing a blood product comprising a porous, fibrous medium which removes leucocytes and permits platelets suspended in plasma to pass therethrough until red blood cells block the fibrous medium.
Claim 9
Dependent Claim
19 words
The filter element of claim 6 wherein said fibrous medium has a CWST of at least about 70 dynes/cm.
Claim 10
Dependent Claim
14 words
The filter element of claim 6 wherein the fibrous medium comprises polybutylene terephthalate fibers.
Claim 11
Independent Claim
27 words
A device comprising a housing and means disposed within the housing for permitting platelets suspended in plasma to flow therethrough until red blood cells block the means.
Claim 12
Independent Claim
27 words
A device comprising a housing and means disposed within the housing for permitting platelets suspended in plasma to flow therethrough until red blood cells block the means.
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) | 1997-05-30 | 1997-11-29 | 1998-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-30 | 2001-11-29 | 2002-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-30 | 2005-11-29 | 2006-05-31 | $7700.00 | Window Closed / Lapsed |