US Patent Issued to KYOCERA Document Solutions on Feb. 24 for "Inkjet ink and inkjet recording apparatus" (Japanese Inventor)

ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,559,638, issued on Feb. 24, was assigned to KYOCERA Document Solutions Inc. (Osaka, Japan).

"Inkjet ink and inkjet recording apparatus" was invented by Arisa Nakanishi (Osaka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An inkjet ink contains quinacridone pigment and aqueous medium. A sulfur concentration in the 10-fold diluent of supernatant liquid obtained by centrifuging the inkjet ink at 1,050,000 G for three hours is 1.0 ppm or more and 6.0 ppm or less. In an ultraviolet and visible ray absorption spectrum of the 25-fold diluent of the supernatant liquid, light absorbance at a predetermined peak is 0.17 or less. The predetermined peak is a...