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:
Jul. 22, 2014
Filed:
Jul. 06, 2011
Hyo Shu, Mishima, JP;
Mitsuo Aoki, Numazu, JP;
Minoru Masuda, Numazu, JP;
Kumi Hasegawa, Numazu, JP;
Hyo Shu, Mishima, JP;
Mitsuo Aoki, Numazu, JP;
Minoru Masuda, Numazu, JP;
Kumi Hasegawa, Numazu, JP;
Ricoh Company, Limited, Tokyo, JP;
Abstract
A toner including toner particles including a binder resin containing at least one polyester resin comprising an inorganic tin (II) compound and an external additive including a particulate inorganic material having a volume average particle diameter greater than 70 nm and less than 300 nm. The binder resin preferably includes a polyester resin having a weight average molecular weight of from 5,000 to 50,000 and another resin having a weight average molecular weight of from 200,000 to 400,000. A developer including the toner; and a developing device, an image forming apparatus and a process cartridge, which form toner images using the toner are also provided.