US Patent Issued to L'Air Liquide Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Georges Claude on Aug. 25 for "Air separation unit and air separation method" (Japanese Inventor)

ALEXANDRIA, Va., Aug. 25 -- United States Patent no. 12,716,651, issued on Aug. 25, was assigned to L'Air Liquide Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Georges Claude (Paris).

"Air separation unit and air separation method" was invented by Kenji Hirose (Kobe, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "The method for reducing or removing non-volatile impurities in a high-purity oxygen liquid comprises: an oxygen vaporization step for vaporizing a high-purity oxygen liquid obtained from a high-purity oxygen rectification column in an air separation unit for producing the high-purity oxygen liquid; and an oxygen recondensing step for recondensing oxygen gas vaporized in the oxyge...