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:
Dec. 17, 2019
Filed:
Sep. 14, 2018
Azumi Miyaake, Kanagawa, JP;
Kaori Miyahara, Shizuoka, JP;
Masayuki Koyano, Kanagawa, JP;
Mio Kumai, Tokyo, JP;
Ayano Momose, Tokyo, JP;
Satoshi Kojima, Kanagawa, JP;
Kiminori Masuda, Tokyo, JP;
Amika Sagara, Tokyo, JP;
Hiroki Hagiwara, Tokyo, JP;
Azumi Miyaake, Kanagawa, JP;
Kaori Miyahara, Shizuoka, JP;
Masayuki Koyano, Kanagawa, JP;
Mio Kumai, Tokyo, JP;
Ayano Momose, Tokyo, JP;
Satoshi Kojima, Kanagawa, JP;
Kiminori Masuda, Tokyo, JP;
Amika Sagara, Tokyo, JP;
Hiroki Hagiwara, Tokyo, JP;
RICOH COMPANY, LTD., Tokyo, JP;
Abstract
An ink includes water, a coloring material, an organic solvent having a solubility parameter of from 8.0 to 13.0, an urethane resin particle and a metal ion, wherein the organic solvent having the solubility parameter of from 8.0 to 13.0 has a proportion of from 10.0% by mass to 30.0% by mass to the ink, where the metal ion is at least one selected from an alkali metal ion and an alkaline earth metal ion, where the metal ion has a proportion of from 4000 mg/L to 8000 mg/L to the ink.