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:
Jan. 15, 1991
Filed:
Sep. 21, 1989
Applicant:
Inventors:
Yuugo Kumagai, Hitachi, JP;
Ryouji Tan, Hitachi, JP;
Takashi Ikeda, Katsuta, JP;
Tetsuya Fujii, Hitachi, JP;
Chiaki Okada, Hitachi, JP;
Osamu Higashida, Hitachi, JP;
Hatuo Sugitani, Ibaraki, JP;
Masato Fukasawa, Hitachi, JP;
Assignee:
Hitachi Chemical Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02G / ; G02G / ;
U.S. Cl.
CPC ...
430110 ; 4301066 ; 430903 ;
Abstract
A dry toner composition comprising (A) a binder resin, (B) a colorant and (C) charge control agents comprising a special metal complex of oxycarboxylic acid (C-1) and a special metal complex of azo compound (C-2) can provide high quality images without causing toner flying even after printed for a long period of time, and thus is useful for providing a dry developer and a process for forming images using said dry developer.