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. 17, 2011
Filed:
Apr. 14, 2006
Takaaki Kaya, Mishima, JP;
Yasukazu Ayaki, Yokohama, JP;
Shigeto Tamura, Suntoh-gun, JP;
Yayoi Tazawa, Mishima, JP;
Ryoichi Fujita, Tokyo, JP;
Yuichi Yajima, Susono, JP;
Takaaki Kaya, Mishima, JP;
Yasukazu Ayaki, Yokohama, JP;
Shigeto Tamura, Suntoh-gun, JP;
Yayoi Tazawa, Mishima, JP;
Ryoichi Fujita, Tokyo, JP;
Yuichi Yajima, Susono, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
In a black toner having at least a binder resin and an iron-titanium composite oxide as a colorant; the iron-titanium composite oxide is contained in a specific amount; the black toner has a specific weight average particle diameter and a specific saturation magnetization; the black toner has, in X-ray diffraction thereof, a maximum peak at 2θ=from 32.5 to 33.1 degrees, having a half width of 0.25 degree or less. The black toner has, in a proportion of less than 30% by number, an iron-titanium composite oxide having, in a sectional photograph of the toner, a maximum frequency of linearity within the range where the linearity is smaller than 2.4 and having a linearity of 3.0 or more, in regard to the number frequency distribution of the linearity of the iron-titanium composite oxide.