US Patent Issued to LG Chem on Sept. 29 for "Super absorbent polymer" (South Korean Inventors)

ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,746,530, issued on Sept. 29, was assigned to LG Chem Ltd. (Seoul, South Korea).

"Super absorbent polymer" was invented by Kyungchan Min (Daejeon, South Korea), Tae Yun Kim (Daejeon, South Korea), Byoung Hyoun Kim (Daejeon, South Korea), Sung Soo Park (Daejeon, South Korea) and Byung Hyun Park (Daejeon, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "A polyacrylic acid (salt)-based super absorbent polymer has a swelling factor (SF) value of 85 to 110 derived by Equation 1. Equation 1 is SF=1+[(7,700/w)x(AS-AR)/AS], wherein w is a weight (mg) of the super absorbent polymer, AS is an absorbance at 620 nm of a solution obtained by centrifuging a...