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. 30, 2022
Filed:
Aug. 26, 2020
Canon Kabushiki Kaisha, Tokyo, JP;
Takaho Shibata, Tokyo, JP;
Yuichi Mizo, Toride, JP;
Koh Ishigami, Abiko, JP;
Takakuni Kobori, Toride, JP;
Masaharu Miura, Toride, JP;
Takeshi Ohtsu, Toride, JP;
Yosuke Iwasaki, Tokyo, JP;
Daisuke Yamashita, Matsudo, JP;
Ryo Nakajima, Nagareyama, JP;
Wakiko Katsumata, Kashiwa, JP;
Hitoshi Sano, Matsudo, JP;
Kenta Mitsuiki, Toride, JP;
Rei Hijikawa, Kashiwa, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A toner containing a toner particle that contains a binder resin including a polyester resin, and a polyolefin resin having —COOM that is a neutralized carboxy group with a monovalent metal ion M, wherein the polyolefin resin having —COOM is a polymer in which a vinyl polymer is bonded to a polyolefin, a content of a monomer unit containing —COOM in the polyolefin resin having —COOM is 1 to 20 mass %, and in a FT-IR spectrum obtained through measurement of a large particle size-side particle group and a small particle size-side particle group obtained by dividing the toner into two substantially equal parts, on a number basis, a ratio of the intensity of a maximum absorption peak in a range from 1545 cmto 1555 cmwith respect to the intensity of a maximum absorption peak in a range from 1713 cmto 1723 cmexhibits a specific relationship.