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:
Jan. 28, 2020
Filed:
Sep. 25, 2018
Canon Kabushiki Kaisha, Tokyo, JP;
Waka Hasegawa, Tokyo, JP;
Ryo Natori, Tokyo, JP;
Ayano Mashida, Kawasaki, JP;
Junji Ito, Hiratsuka, JP;
Yasuhiro Aichi, Tokyo, JP;
Jun Shirakawa, Kawaguchi, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A liquid developer comprising a carrier liquid, a toner particle insoluble in the carrier liquid, and a polymer having a primary amino group and soluble in the carrier liquid, wherein the toner particle comprises a polyester resin having an acidic group, an acid value of the polyester resin is at least 5 mg KOH/g, a pKa of the acidic group is not more than 3.4, and the polymer having a primary amino group has a primary amino group at a position other than the end of a main chain of the polymer, and method of producing thereof.