ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,447,443, issued on Oct. 21, was assigned to REDSTACK B.V. (Sneek, Netherlands).
"Stack assembly" was invented by Joost Veerman (Sneek, Netherlands), Rinze Bles (Sneek, Netherlands) and Albert Thaeke Russchen (Sneek, Netherlands).
According to the abstract* released by the U.S. Patent & Trademark Office: "Stack assembly comprising a hollow external housing having a central axis, the external housing extending from a first end to a second end and enclosing a housing space, and a membrane stack comprising a plurality of membranes, wherein the membrane slack is positionable inside the external housing and a number of side plates extending substantially parallel to the central axis, where...