ALEXANDRIA, Va., March 26 -- United States Patent no. 12,256,971, issued on March 25, was assigned to Channel Medsystems Inc. (Berkeley, Calif.).

"Liner for cryogenic treatment systems" was invented by Daniel R. Burnett (San Francisco) and William Malecki (Piedmont, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Liners for cryogenic treatment systems are described where a cryogenic fluid or gas may be introduced into a liner expanded within a body lumen such as the uterine cavity. The liner may be intentionally sized to be substantially larger than the typical size of the uterine cavity, e.g., 1.2 times (or more), greater than the size of the uterine cavity into which the liner is inserted. Because th...