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:
Aug. 08, 2023
Filed:
Jun. 10, 2021
Canon Kabushiki Kaisha, Tokyo, JP;
Takakuni Kobori, Ibaraki, JP;
Kenta Mitsuiki, Ibaraki, JP;
Hitoshi Sano, Chiba, JP;
Wakiko Katsumata, Chiba, JP;
Daisuke Yamashita, Chiba, JP;
Yosuke Iwasaki, Tokyo, JP;
Takeshi Ohtsu, Ibaraki, JP;
Takaho Shibata, Tokyo, JP;
Masaharu Miura, Ibaraki, JP;
Koh Ishigami, Chiba, JP;
Yuichi Mizo, Ibaraki, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A toner comprising a toner particle comprising a binder resin including a polyester resin, and a polyolefin resin having a sulfonic acid group, wherein the polyolefin resin having a sulfonic acid group is a polymer in which a vinyl polymer is bonded to a polyolefin, a content ratio of a monomer unit containing a sulfonic acid group in the vinyl polymer is from 1.0 mass % to 20.0 mass %, in a FT-IR spectrum obtained through measurement of a large particle size toner and a small particle size toner resulting from dividing, on a number basis, the toner into two substantially equal parts, a ratio of an intensity of a maximum absorption peak in a range from 1130 cmto 1170 cmwith respect to an intensity of a maximum absorption peak in a range from 1713 cmto 1723 cmexhibits a specific relationship.