US Patent Issued to SANYO CHEMICAL INDUSTRIES on March 25 for "Viscosity index improver and lubricating oil composition" (Japanese Inventors)

ALEXANDRIA, Va., March 26 -- United States Patent no. 12,258,534, issued on March 25, was assigned to SANYO CHEMICAL INDUSTRIES LTD. (Kyoto, Japan).

"Viscosity index improver and lubricating oil composition" was invented by Nobuhiro Naito (Kyoto, Japan), Satoshi Matsumoto (Kyoto, Japan), Masahiro Hashimoto (Kyoto, Japan), Kenyuu Yoshida (Kyoto, Japan), Hiroki Yamashita (Kyoto, Japan) and Ryota Sato (Kyoto, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention aims to provide a viscosity-index improving agent having an excellent friction reduction effect to reduce friction of a lubricating oil composition when the viscosity-index improving agent is added thereto. The present also aims to ...