ALEXANDRIA, Va., Sept. 3 -- United States Patent no. 12,404,469, issued on Sept. 2, was assigned to L'Air Liquide Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude (Paris).
"Arrangement for regulation of a plant for the membrane permeation treatment of biogas" was invented by Arnaud Cerceau (Sassenage, France).
According to the abstract* released by the U.S. Patent & Trademark Office: "Arrangement for regulation of a plant I for the membrane permeation treatment of a feed gas stream, comprising at least methane and carbon dioxide, that includes at least one means A for measurement of the gross calorific value (GCV) of the feed gas stream, at least one means B for comparison of the gross calorific value with a setp...