US Patent Issued to POWDERTECH on March 18 for "Ferrite particles, electrophotographic developer carrier core material, electrophotographic developer carrier, and electrophotographic developer" (Japanese Inventors)

ALEXANDRIA, Va., March 19 -- United States Patent no. 12,253,825, issued on March 18, was assigned to POWDERTECH Co. LTD. (Kashiwa, Japan).

"Ferrite particles, electrophotographic developer carrier core material, electrophotographic developer carrier, and electrophotographic developer" was invented by Makoto Ishikawa (Chiba, Japan) and Tetsuya Uemura (Chiba, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a ferrite particle, containing a crystal phase component containing a perovskite crystal represented by the compositional formula:RZrO3 (provided that R represents an alkaline earth metal element), and having an apparent density in a range represented by the following f...