US Patent Issued to HOKUETSU on July 14 for "Filter material for air filter and method for producing filter material" (Japanese Inventors)

ALEXANDRIA, Va., July 14 -- United States Patent no. 12,678,724, issued on July 14, was assigned to HOKUETSU Corp. (Nagaoka, Japan).

"Filter material for air filter and method for producing filter material" was invented by Nozomi Tashiro (Nagaoka, Japan) and Masashi Sato (Nagaoka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A filter medium for an air filter is composed of a wet-laid nonwoven fabric. The filter medium contains a binder resin and a water repellent. The water repellent contains, as a main component, a hydrocarbon-based polymer free of fluorine and silicon in a molecule thereof. The binder resin and the water repellent are crosslinked by an isocyanate crosslinking component."

The paten...