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. 15, 2026
Filed:
Jul. 11, 2024
Kyocera Document Solutions Inc., Osaka, JP;
Satoshi Sato, Osaka, JP;
KYOCERA DOCUMENT SOLUTIONS INC., Osaka, JP;
Abstract
An inkjet ink includes: a quinacridone pigment; a pigment coating resin; and an aqueous medium. The pigment coating resin includes an adsorbed resin that is adsorbed on the quinacridone pigment and an unadsorbed resin that is not adsorbed on the quinacridone pigment. A ratio of the unadsorbed resin to the pigment coating resin is 18 mass % or more and 52 mass % or less. A phosphorus concentration in a supernatant liquid is 1.0 ppm or more and 12.5 ppm or less, the supernatant liquid being obtained by centrifuging the inkjet ink at 1,050,000 G for 3 hours. A sulfur concentration in the supernatant liquid is 1.0 ppm or more and 12.5 ppm or less. Absorbance of a first peak in an ultraviolet-visible light absorption spectrum of a 25-fold diluted solution of the supernatant liquid is 0.010 or less.