US Patent Issued to L'Air Liquide Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Georges Claude on May 13 for "Gas purification method and device" (French Inventors)

ALEXANDRIA, Va., June 12 -- United States Patent no. 12,297,107, issued on May 13, was assigned to L'Air Liquide Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Georges Claude (Paris).

"Gas purification method and device" was invented by Robin Ladous (Sassenage, France) and Golo Zick (Sassenage, France).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed is a method for purifying a main gas, in particular helium, from a source gas stream comprising the main gas, a main impurity, in particular nitrogen, and optionally another, secondary impurity, in particular oxygen, the method comprising a step of partial condensation of the gas stream in order to extract therefrom impurities in liquid form,...