US Patent Issued to SEIKO EPSON on June 23 for "Ink jet ink composition and recording method" (Japanese Inventors)

ALEXANDRIA, Va., July 15 -- United States Patent no. 12,662,602, issued on June 23, was assigned to SEIKO EPSON Corp. (Japan).

"Ink jet ink composition and recording method" was invented by Sena Gozu (Shiojiri, Japan) and Kenta Uchida (Matsumoto, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An ink jet ink composition functioning as a water-based magenta ink includes an azo-based pigment and a 1,2-alkanediol having 4 to 8 carbon atoms. In the ink jet ink composition described above, the azo-based pigment has a volume average particle diameter D50 of 110 nm or less, and a content of the 1,2-alkanediol having 4 to 8 carbon atoms with respect to a total mass of the composition is 3.5 percent by mass or l...