ALEXANDRIA, Va., June 17 -- United States Patent no. 12,315,892, issued on May 27, was assigned to INFICON GmbH (Cologne, Germany).
"Tightness test of a liquid filled test object" was invented by Maximilian Reismann (Cologne, Germany) and Daniel Wetzig (Cologne, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method for a tightness test of a test object filled with a liquid, said test object having an internal pressure which is lower than atmospheric pressure, comprising the following steps: inserting the test object into a test chamber, evacuating the test chamber to a pressure which is lower than the internal pressure inside the test object, drawing off the test chamber residual gas components tog...