US Patent Issued to L'Air Liquide Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Georges Claude on April 7 for "Air separation apparatus" (Chinese, Japanese Inventors)

ALEXANDRIA, Va., April 7 -- United States Patent no. 12,595,961, issued on April 7, was assigned to L'Air Liquide Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Georges Claude (Paris).

"Air separation apparatus" was invented by Maxime Ranchoux (Hangzhou, China) and Shinji Tomita (Kobe, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An air separation apparatus comprises: a first rectification column, a first condensing portion, a second rectification column, a third rectification column, a second condensing portion, a fourth rectification column, a third condensing portion, and a recycling pipe for recycling a gas drawn from the third condensing portion to the second rectification column. T...