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:
Nov. 17, 1992
Filed:
Oct. 25, 1991
Applicant:
Inventors:
Isao Niimura, Tokyo, JP;
Mitsutoshi Anzai, Tokyo, JP;
Hiroyoshi Yamaga, Tokyo, JP;
Noboru Akuzawa, Tokyo, JP;
Assignee:
Hodogaya Chemical Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
430110 ; 4301066 ; 430108 ;
Abstract
An electrophotographic developing powder comprising a resin, a coloring agent and a compound of the following formula, as a charge-controlling agent: ##STR1## wherein X is sodium or potassium, and M is a chromium or cobalt atom.