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:
Oct. 26, 2010
Filed:
Mar. 16, 2007
Masahide Yamada, Numazu, JP;
Shigeru Emoto, Numazu, JP;
Naohiro Watanabe, Sunto-gun, JP;
Masahiro Ohki, Numazu, JP;
Akinori Saitoh, Numazu, JP;
Shinichi Wakamatsu, Numazu, JP;
Masahide Yamada, Numazu, JP;
Shigeru Emoto, Numazu, JP;
Naohiro Watanabe, Sunto-gun, JP;
Masahiro Ohki, Numazu, JP;
Akinori Saitoh, Numazu, JP;
Shinichi Wakamatsu, Numazu, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A toner containing a colorant, and a binder resin, wherein the toner is prepared by dissolving or dispersing a colorant, a precursor of the binder resin having a site capable of reacting with an active hydrogen group-containing compound, the active hydrogen group-containing compound, in an organic solvent, to prepare a toner constituent mixture liquid, dispersing or emulsifying the toner constituent mixture liquid, in an aqueous medium while subjecting the precursor to a reaction with the active hydrogen group-containing compound, to prepare a toner dispersion, and removing the organic solvent from the toner dispersion; the binder resin contains a modified polyester having an isocyanate-derived binding site; the Sn content in the toner is 800 ppm or less; the content of a metal which is non Sn and derived from a polyesterified catalyst is 10 ppm to 200 ppm; and the content of a metal which is non Sn and derived from an isocyanated catalyst is 10 ppm to 200 ppm.