US Patent Issued to DOWA ELECTRONICS MATERIALS, DOWA IP CREATION on Oct. 6 for "Carrier core material and electrophotographic development carrier using same and electrophotographic developer" (Japanese Inventor)

ALEXANDRIA, Va., Oct. 6 -- United States Patent no. 12,754,491, issued on Oct. 6, was assigned to DOWA ELECTRONICS MATERIALS Co. LTD. (Tokyo) and DOWA IP CREATION Co. LTD. (Okayama, Japan).

"Carrier core material and electrophotographic development carrier using same and electrophotographic developer" was invented by Shinya Sasaki (Okayama, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A carrier core material includes ferrite particles, contains CaSiO3, and has a true density at least equal to 3.5 g/cm3 and at most equal to 4.5 g/cm3. A particle strength index calculated from formula (1) is preferably at most equal to 1.5% by volume. (1): Particle strength index=V2-V1 (In the formula, V1: cumulative v...