The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 28, 1992
Filed:
Feb. 16, 1990
Applicant:
Inventors:
Souichiro Kishimoto, Ohnojyo, JP;
Tsutomu Sakaida, Uji, JP;
Yoshiaki Echigo, Uji, JP;
Keiichi Asami, Jouyou, JP;
Tetsuro Toda, Hiroshima, JP;
Kazuo Fujioka, Hiroshima, JP;
Eiichi Kurita, Hiroshima, JP;
Toshiyuki Hakata, Hiroshima, JP;
Shigeru Takaragi, Hiroshima, JP;
Assignees:
Toda Kogyo Corp., Hiroshima, JP;
Unitika Ltd., Hyogo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
430108 ; 4301066 ;
Abstract
Disclosed herein are composite carrier particles for electrophotography comprising 80 to 99% by weight of ferromagnetic fine particles and a phenol resin, and having a number-average particle diameter of 10 to 1,000 .mu.m, a bulk density of not more than 2.0 g /cm.sup.3, and a curved surface configuration, and a process for producing the same.