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. 19, 2016
Filed:
Oct. 17, 2012
Masaki Watanabe, Shizuoka, JP;
Satoshi Ogawa, Nara, JP;
Teruki Kusahara, Shizuoka, JP;
Ryuta Yoshida, Kanagawa, JP;
Masaki Watanabe, Shizuoka, JP;
Satoshi Ogawa, Nara, JP;
Teruki Kusahara, Shizuoka, JP;
Ryuta Yoshida, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A toner including a non-crystalline polyester resin and a crystalline polyester resin, wherein a tetrahydrofuran soluble component of the non-crystalline polyester resin has a weight-average molecular weight of 3,000 to 8,000 measured by gel permeation chromatography, and wherein the toner has a glass transition temperature A before an extraction process of the toner with methanol and a glass transition temperature B after the extraction process of the toner with methanol, and a difference between A and B (B−A) is 2.0° C. or less.