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. 24, 2012
Filed:
Mar. 13, 2009
Naohiro Watanabe, Shizuoka, JP;
Hiroshi Yamashita, Numazu, JP;
Shinichi Wakamatsu, Numazu, JP;
Tsuyoshi Sugimoto, Mishima, JP;
Naohiro Watanabe, Shizuoka, JP;
Hiroshi Yamashita, Numazu, JP;
Shinichi Wakamatsu, Numazu, JP;
Tsuyoshi Sugimoto, Mishima, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
Provided is a toner for image formation, granulated by dispersing, emulsifying, or both dispersing and emulsifying an oil phase containing toner constituting materials in an aqueous medium. The toner constituting materials contain a binder resin, a colorant and a pigment dispersant which is a polyester derivative having an acid value of 28 to 50 mgKOH/g and an amine value of 1 to 50 mgKOH/g, and satisfy the following Expressions 1 and 2, where Expression 1 represents a mass ratio, α is a glass transition temperature of the binder resin, and β is a glass transition temperature of a mixture of the binder resin and the pigment dispersant in the ratio of Expression 1.Binder resin:Pigment dispersant=100:5  Expression 10° C.≦α−β≦10° C.  Expression 2
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile