ALEXANDRIA, Va., May 26 -- United States Patent no. 12,636,621, issued on May 26, was assigned to The Regents of the University of California (Oakland, Calif.).

"Filtration membrane" was invented by Benjamin W. Chui (Sunnyvale, Calif.), Shuvo Roy (San Francisco) and Nathan Wright (San Francisco).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure provides an improved filtration membrane suitable for filtration of blood in vivo. The improved filtration membrane is resistant to breakage with minimal areal penalty due to presence of a system of supports on the backside of the membrane. The minimal areal penalty is achieved by using supports that provide a hierarchical scaffolding that comprises...