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:
May. 15, 1984
Filed:
Apr. 11, 1983
Applicant:
Inventors:
Eiichi Imai, Narashino, JP;
Hitoshi Uchide, Yokohama, JP;
Kazunori Murakawa, Tokyo, JP;
Masaki Uchiyama, Tokyo, JP;
Hisayuki Ochi, Tokyo, JP;
Motoo Urawa, Funabashi, JP;
Seiichi Takagi, Tokyo, JP;
Yasuo Mitsuhashi, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01G / ; G03C / ;
U.S. Cl.
CPC ...
430107 ; 252 6254 ; 252 6256 ; 4301066 ; 430903 ;
Abstract
Red to sepia magnetic toners stable to heat and light which do not fade or discolor for a long period of time are prepared by incorporating a partially .alpha.-transformed .gamma.-Fe.sub.2 O.sub.3 as a component in a toner.