ALEXANDRIA, Va., March 26 -- United States Patent no. 12,258,284, issued on March 25, was assigned to AD'ALL Co. LTD. (Japan), UNITIKA Ltd. (Japan) and OSAKA GAS CHEMICALS Co. LTD. (Japan).
"Activated carbon" was invented by Tomoyasu Nakano (Kyoto, Japan), Hirokazu Shimizu (Kyoto, Japan) and Keiji Sakai (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "There is provided an activated carbon having a high total trihalomethane filtration capacity, even in water treatment by passing water at a high superficial velocity (SV). In the activated carbon of the present invention, a pore volume A (cc/g) of pores with a size of 1.0 nm or less, of pore volumes calculated by the QSDFT method, is 0.300 cc/g or m...