Leukocyte depletion filter media, filter produced therefrom, method of making same and method of using same
First Claim
Patent Images
1. A method for manufacturing a leukocyte depletion filter media comprises the steps of:
- a) preparing a filter media of a nonwoven material;
b) making the filter media wettable if it is non inherently wettable;
c) coating the media with a cationic polysaccharide having functionalized side groups capable of crosslinking; and
d) heating the filter media so as to cause the functionalized side groups in the coating to crosslink intramolecularly without the use of a crosslinking agent.
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Abstract
A leukocyte depletion filter media includes nonwoven material or microfiber glass which has been coated with a polysaccharide originally containing functionalized side chains capable of crosslinking with each other and the filter media. The leukocyte depletion filter media preferably includes a polysaccharide having a charge density of up to 5 meq/g.
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Citations
39 Claims
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1. A method for manufacturing a leukocyte depletion filter media comprises the steps of:
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a) preparing a filter media of a nonwoven material;
b) making the filter media wettable if it is non inherently wettable;
c) coating the media with a cationic polysaccharide having functionalized side groups capable of crosslinking; and
d) heating the filter media so as to cause the functionalized side groups in the coating to crosslink intramolecularly without the use of a crosslinking agent. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for manufacturing a leukocyte depletion filter media comprises the steps of:
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a) preparing a filter media of a microfiber glass;
b) coating the media with a cationic polysaccharide having functionalized side groups capable of crosslinking; and
c) heating the filter media so as to cause the functionalized side groups in the coating to crosslink intramolecularly without the use of a crosslinking agent. - View Dependent Claims (9, 10, 11)
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- 12. A method for manufacturing a leukocyte depletion filter media comprises the steps of a) preparing a wettable filter media of a nonwoven material, b) coating the media with a cationic polysaccharide having functionalized side groups capable of crosslinking, and c) heating the filter media so as to cause the functionalized side groups in the coating to crosslink intramolecularly without the use of a crosslinking agent.
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19. A method of filtering leukocytes form whole blood includes the steps of:
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a) obtaining a unit of whole blood;
b) passing the whole blood through a leukocyte depletion filter media including a filter media that has been coated with a cationic polysaccharide originally having functionalized side groups capable of crosslinking intramolecularly without the use of a crosslinking agent. - View Dependent Claims (20)
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21. A method of filtering leukocytes form whole blood includes the steps of:
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a) obtaining a unit of whole blood;
b) separating the desirable blood component from the whole blood; and
c) passing the desirable blood component through a leukocyte depletion filter media including a filter media that has been coated with a cationic polysaccharide originally having functionalized side groups capable of crosslinking intramolecularly without the use of a crosslinking agent. - View Dependent Claims (22)
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23. A leukocyte depletion filter comprising:
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a) a fluid intake;
b) a fluid exit; and
c) a leukocyte depletion filter media including a nonwoven material which has been coated with a cationic polysaccharide originally containing functionalized side chains capable of crosslinking intramolecularly without the use of a crosslinking agent, said filter situated between said fluid intake and said fluid exit. - View Dependent Claims (24, 25, 26, 27)
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28. A leukocyte depletion filter comprising:
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a) a fluid intake;
b) a fluid exit; and
c) a leukocyte depletion filter media including a microfiber glass material which has been coated with a cationic polysaccharide originally containing functionalized side chains capable of crosslinking intramolecularly without the use of a crosslinking agent, said filter situated between said fluid intake and said fluid exit. - View Dependent Claims (29, 30, 31)
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32. A leukocyte depletion filter media comprising:
- nonwoven material which has been coated with a cationic polysaccharide originally containing functionalized side chains capable of crosslinking intramolecularly without the use of a crosslinking agent.
- View Dependent Claims (33, 34, 35)
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36. A leukocyte depletion filter media comprising:
- a microfiber glass material which has been coated with a cationic polysaccharide originally containing functionalized side chains capable of crosslinking intramolecularly without the use of a crosslinking agent.
- View Dependent Claims (37, 38, 39)
Specification