Patent ID: 11883784
Assignee: FRESENIUS MEDICAL CARE HOLDINGS, INC.
Field: Chemical engineering (Chemistry)
Classification: CPC B  A | IPC A  B

Claim 17:
18. A microporous membrane comprising at least one non-active region and at least one active surface, wherein the at least one active surface includes a coating and wherein the at least one non-active region and the at least one active surface each comprise at least one polymer, and the coating consists essentially of the polymeric at least one additive, the at least one additive itself is a polymeric additive and has (i) a water absorption from 20% up to 1000% of the weight of dry additive, and (ii) wherein the microporous membrane has a reduced blood platelet reduction relative to the microporous membrane without the at least one additive, and wherein the at least one additive of the coating is diffused towards the at least one non-active region such that a concentration of the at least one additive decreases in a direction from the at least one active surface towards the at least one non-active region.