ALEXANDRIA, Va., July 9 -- United States Patent no. 12,351,796, issued on July 8, was assigned to The Board of Trustees of the Leland Stanford Junior University (Stanford, Calif.) and BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM (Austin, Texas).

"Methods for rapid separation and purification of DNA topological forms" was invented by Massa Shoura (Stanford, Calif.), Stephen Levene (Redwood City, Calif.) and David Girata (Redwood City, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Methods are provided for the isolation and analysis of circular DNA from complex samples, based on the topology of the DNA molecule. A sample comprising DNA species is combined with a chaotropic dense salt solution. A fra...