ALEXANDRIA, Va., March 19 -- United States Patent no. 12,252,681, issued on March 18, was assigned to Upside Foods Inc. (Berkeley, Calif.).

"Systems, devices, and methods for sterilizing bioreactors and culture media" was invented by Matthew Leung (Richmond, Calif.), Patricia Rae Benton (Huntington Beach, Calif.), Cameron Gentry Copeland (Walnut Creek, Calif.), Stephen K. Hsu (Albany, N.Y.) and Kalle Lukyan Johnson (Orinda, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed herein are systems, devices, and methods for sterilization. In some variations, a method of sterilizing a bioreactor system may comprise circulating a sterilant in a bioreactor and an enclosed vessel in fluidic communication ...