ALEXANDRIA, Va., March 31 -- United States Patent no. 12,589,336, issued on March 31.
"Lightweight fibrous media (LFM) filter" was invented by Theodore A. Kuepper (Oxnard, Calif.) and Robert C. Lovo (Somis, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A filtration system using lightweight fibrous media (LFM) filter balls that are pre-compressed into an intermediary vessel or element before placing into an outer pressure-holding housing and where the LFM filter balls can be removed periodically to allow separation and relaxation of the media for cleaning. A plurality of lightweight fibrous media balls is pre-compressed at a predetermined ratio of compression and packing density inside their intermedi...