ALEXANDRIA, Va., June 5 -- United States Patent no. 12,274,985, issued on April 15, was assigned to ASAHI KASEI MEDICAL Co. LTD. (Tokyo).
"Porous membrane" was invented by Yasutaka Takazono (Tokyo) and Masayasu Komuro (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "The problem is to provide a porous membrane with a reduced phenomenon in which membranes firmly adhere to one another during production of the porous membrane (membrane adhesion). The problem is solved by a porous membrane comprising a hydrophobic polymer and a hydrophilic polymer, wherein an average value T of ratios of the number of counts of ions derived from the hydrophilic polymer to the number of counts of ions derived from the hydroph...