US Patent Issued to TORAY INDUSTRIES on Oct. 7 for "Composite semipermeable membrane" (Japanese Inventors)

ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,434,202, issued on Oct. 7, was assigned to TORAY INDUSTRIES Inc. (Tokyo).

"Composite semipermeable membrane" was invented by Harutoki Shimura (Shiga, Japan), Takaaki Yasuda (Shiga, Japan) and Shinya Mitsui (Shiga, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A composite semipermeable membrane, including: a microporous support layer; and a separation functional layer provided on the microporous support layer, in which the separation functional layer includes a crosslinked wholly aromatic polyamide which is a polycondensation product of a polyfunctional aromatic amine and a polyfunctional aromatic acid chloride and contains amino groups and carboxy...