US Patent Issued to POWDERTECH on Oct. 7 for "Ferrite particles, electrophotographic developer carrier core material, electrophotographic developer carrier, and electrophotographic developer" (Japanese Inventors)

ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,436,480, issued on Oct. 7, 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 (Kashiwa, Japan) and Tetsuya Uemura (Kashiwa, 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 a compositional formula: RZrO3 (provided that R represents an alkaline earth metal element), having a surface roughness Rz of 0.8 micro metre or more and 3.5 micro met...