US Patent Issued to BL TECHNOLOGIES on May 27 for "Melt-blown depth filter element and method of making it" (Minnesota Inventors)

ALEXANDRIA, Va., June 17 -- United States Patent no. 12,311,296, issued on May 27, was assigned to BL TECHNOLOGIES INC. (Minnetonka, Minn.).

"Melt-blown depth filter element and method of making it" was invented by Travis Gerald Stifter (Minnetonka, Minn.) and Thomas Martin Aune (Minnetonka, Minn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A tubular depth filter element has one or more concentric zones. Each zone includes layers of a melt blown filament. An additional filament oscillates through the depth of the element, traversing through part of the depth of the filament with each oscillation but traversing through substantially all of the depth of the element over multiple oscillations. The traversing...