Liquid purification or separation – Filter – Material
Reexamination Certificate
2004-08-26
2008-10-28
Fortuna, Ana M (Department: 1797)
Liquid purification or separation
Filter
Material
C210S500270, C210S500420, C210S500360, C210S500410
Reexamination Certificate
active
07442302
ABSTRACT:
The present invention provides a highly water permeable hollow fiber membrane type blood purifier for medical use, which is excellent in safety and module-assembling ease and which has a high water permeability suitable for use in therapy of chronic renal failure.The present invention relates to a highly water-permeable hollow fiber type blood purifier comprising hydrophobic polymer hollow fiber membranes each of which contains a hydrophilic polymer, characterized in that the amount of the hydrophilic polymer eluted from the hollow fiber membrane is 10 ppm or less; in that the ratio of the hydrophilic polymer in the outer surface of the hollow fiber membrane is 25 to 50 mass %; in that the burst pressure of the hollow fiber membrane is 0.5 MPa or higher; and in that the coefficient of water permeability of the blood purifier is 150 ml/m2/hr./mmHg or higher.
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Koyama Shinya
Kuze Katsuaki
Mabuchi Kimihiro
Monden Noriko
Nose Katsuhiko
Fish & Richardson P.C.
Fortuna Ana M
Toyo Boseki Kabushiki Kaisha
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