ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,441,993, issued on Oct. 14, was assigned to ATLANTIC CANCER RESEARCH INSTITUTE (Moncton, Canada).

"Isolation of extracellular vesicles by precipitation or immobilization using polyethylenimine and polyethylenimine-coated solid supports" was invented by Catherine Taylor (Boundary Creek, Canada) and Jeremy Roy (Moncton, Canada).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present application relates to methods for the isolation of EVs from a sample containing EVs, the method comprising: (i) contacting the sample with one or more polyethylenimines to form an EV-polyethylenimine complex; and (ii) separating the EV-polyethylenimine complex from the samp...