US Patent Issued to TOYOBO on July 29 for "Composite membrane and method for producing composite membrane" (Japanese Inventors)

ALEXANDRIA, Va., July 30 -- United States Patent no. 12,370,503, issued on July 29, was assigned to TOYOBO Co. LTD. (Osaka, Japan).

"Composite membrane and method for producing composite membrane" was invented by Takashi Ohkame (Otsu, Japan) and Masafumi Shibuya (Otsu, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A composite membrane comprising a supporting membrane that includes polyphenylene oxide and a separation layer that is disposed on one main surface of the supporting membrane, wherein the polyphenylene oxide is sulfonated on the one main surface of the supporting membrane and the separation layer includes polyvinyl alcohol having an ionic functional group."

The patent was filed on Sept. 11,...