ALEXANDRIA, Va., July 23 -- United States Patent no. 12,364,969, issued on July 22, was assigned to Puraffinity Ltd. (London).

"Modified polyamines grafted to a particulate, solid support as sorbent materials for removal of target substances from fluids" was invented by Benjamin David Reeve (London), Wen Li (London), Katharina Reeh (London), Amanda Yi Fen You (London) and Henrik Hagemann (London).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided are compositions for removal of a target substance from a fluid stream, the composition comprising a polyamine; and a covalently linked hydrophobic group, wherein the polyamine is covalently linked to a support material. Also provided are processes for removal o...