ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,419,553, issued on Sept. 23, was assigned to ACCU-GLASS LLC (St. Louis).
"Capillary tube closure" was invented by Craig Stout (Port Matilda, Pa.), Thomas Pesch (St. Louis), William Blakeney Harrison (St. Louis) and Paul Anthony Vitale (St. Louis).
According to the abstract* released by the U.S. Patent & Trademark Office: "A closure adapted for insertion in a tube having a first end and an opposed second end and a bore extending therethrough. The tube adapted to draw a liquid into the tube by virtue of capillary action. The closure at least partially insertable in the first end and adapted to be slidably movable between a first position and a third position. The closure includes a su...