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:
Sep. 22, 2015
Filed:
Sep. 12, 2013
Ricoh Company, Ltd., Tokyo, JP;
Akihiko Matsuyama, Shizuoka, JP;
Mitsuru Naruse, Shizuoka, JP;
Masayasu Nonogaki, Shizuoka, JP;
Minoru Hakiri, Shizuoka, JP;
Keita Katoh, Shizuoka, JP;
Kazukiyo Nagai, Shizuoka, JP;
Yuusuke Koizuka, Shizuoka, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An ink composition contains a pigment represented by the following chemical formula 1; a hydrosoluble solvent; and water, wherein the pigment satisfies the following relation 1:0.040<Y/X<0.200 (Relation 1), where, in a CuKα X-ray diffraction spectrum having a wavelength of 1.541 Å, X represents a peak intensity at a Bragg (2θ±0.2°) angle in a range of 2θ of from 26.5° to 27.5° and Y represents a peak intensity at a Bragg (2θ±0.2°) angle in a range of 2θ of from 11.0° to 11.5°: