ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,440,794, issued on Oct. 14, was assigned to NITTO DENKO Corp. (Osaka, Japan).

"Air filter medium, filter pleat pack, and air filter unit" was invented by Go Sato (Osaka, Japan), Masaaki Mori (Osaka, Japan), Shunsuke Masaki (Osaka, Japan) and Yusuke Ikemura (Osaka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A provided air filter medium is an air filter medium including a porous fluorine resin membrane, the air filter medium further including: a glass filter medium layer. The glass filter medium layer and the porous fluorine resin membrane are placed in this order from upstream to downstream of the air filter medium configured to allow an air fl...