ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,420,236, issued on Sept. 23, was assigned to MEMBION GMBH (Roetgen, Germany).
"Membrane filter and filtering method" was invented by Dirk Volmering (Aachen, Germany) and Klaus Vossenkaul (Aachen, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A membrane filter for submerged operation for filtering a liquid, comprising membrane elements and geyser elements for flushing the membrane elements in pulses using a gas, each membrane element having: hollow fiber membranes secured in a base element, each hollow fiber membrane having a lumen into which a liquid permeate is filterable out of the liquid, a permeate collection cavity connected to the lumens...