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. 24, 2017
Filed:
Dec. 17, 2015
Canon Kabushiki Kaisha, Tokyo, JP;
Noritaka Toyoizumi, Mishima, JP;
Yusuke Kosaki, Susono, JP;
Tetsuya Kinumatsu, Mishima, JP;
Kenji Aoki, Mishima, JP;
Shuntaro Watanabe, Hadano, JP;
Takaaki Kaya, Suntou-gun, JP;
Atsushi Tani, Suntou-gun, JP;
Kazumichi Nakahama, Suntou-gun, JP;
Shinnosuke Koji, Yokohama, JP;
Takashige Kasuya, Numazu, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
Provided is a method of producing a toner including the steps of: mixing a resin solution comprising a resin R, a colorant, and an organic solvent, a resin fine particle comprising a resin S containing an element α, and carbon dioxide to form a droplet having a surface covered with the resin fine particle; introducing carbon dioxide in a liquid state and pressurizing to extract the organic solvent in the droplet; and removing the extracted organic solvent together with the carbon dioxide to provide a toner particle. In the method of producing a toner, when the resin fine particle is treated with the carbon dioxide in a liquid state, a change in amount of the element α on the surface of the resin fine particle after the treatment as compared to the amount before the treatment falls within a specific range.