US Patent Issued to DL Chemical on June 30 for "Lubricating oil viscosity index improver and lubricating oil composition containing the same" (South Korean Inventors)

ALEXANDRIA, Va., July 16 -- United States Patent no. 12,668,757, issued on June 30, was assigned to DL Chemical Co. LTD. (Seoul, South Korea).

"Lubricating oil viscosity index improver and lubricating oil composition containing the same" was invented by Jin Hun Ju (Daejeon, South Korea), Eui Seong Baek (Seoul, South Korea), Myung Hyun Kim (Seoul, South Korea), Yong Hwan Shin (Seoul, South Korea), Sang Deok Mun (Daejeon, South Korea), Sang Eun Yoon (Daejeon, South Korea), Je Hyeon Wie (Daejeon, South Korea) and Soo Hwan Park (Daejeon, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "Proposed is a lubricating oil viscosity index improver containing a liquid alpha-olefin copolymer in which ethylene an...