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. 03, 2018
Filed:
May. 22, 2017
Applicants:
Yoshiki Yanagawa, Kanagawa, JP;
Takuya Yamazaki, Shizuoka, JP;
Takahiro Yoshida, Ibaraki, JP;
Inventors:
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C09D 11/322 (2014.01); C09D 11/32 (2014.01); C09D 11/326 (2014.01); B41J 2/015 (2006.01); B41J 2/135 (2006.01); B41J 2/315 (2006.01); C09D 11/324 (2014.01); C09D 11/02 (2014.01);
U.S. Cl.
CPC ...
C09D 11/322 (2013.01); B41J 2/315 (2013.01); C09D 11/02 (2013.01); C09D 11/32 (2013.01); C09D 11/324 (2013.01); C09D 11/326 (2013.01);
Abstract
An ink is provided. The ink includes a quinacridone pigment and an organic solvent having a solubility parameter of from 9.00 to 11.80 in an amount of from 30% to 60% by mass of total mass of the ink. Both a viscosity change rate and a particle diameter change rate of the ink, before and after the ink is heated at 80° C. for 4 weeks in a sealed state, are in the range of from −5% to 1%.