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:
Jul. 09, 2024
Filed:
Feb. 12, 2021
Ricoh Company, Ltd., Tokyo, JP;
Hiyori Fujino, Shizuoka, JP;
Keisuke Tada, Shizuoka, JP;
Shoki Matsuda, Shizuoka, JP;
Fumihiko Chimoto, Shizuoka, JP;
Takashi Okano, Shizuoka, JP;
Ayumi Satoh, Shizuoka, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A magenta toner is provided. The magenta toner comprises toner particles each comprising a binder resin and a colorant. From 1.0% to 25.0% by number of the toner particles have a CH rate of 25.0% or more in absolute value. The CH rate is calculated from the following formula (1):rate(%)=[()/]×100 Formula (1)where, in a Raman spectrum of each toner particle, Irepresents an integrated intensity within a wavenumber region of from 2,750 to 3,250 cmwhen an intensity at a wavenumber λ within a wavenumber region of from 1,200 to 3,250 cmis s normalized to 1, where a total intensity of all the toner particles is maximum at the wavenumber λ; and Irepresents an average of the I.