US Patent Issued to SEIKO EPSON on July 21 for "Ink jet ink composition and recording method" (Japanese Inventor)

ALEXANDRIA, Va., July 21 -- United States Patent no. 12,686,781, issued on July 21, was assigned to SEIKO EPSON Corp. (Japan).

"Ink jet ink composition and recording method" was invented by Kentaro Hara (Shiojiri, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An aqueous ink jet ink composition includes a color material, an acetylene glycol-based surfactant, glycerin, a 6-, 7-, or 8-membered lactam, in which the content of the glycerin is 9% by mass or less based on the total mass of the ink composition, and the mass ratio of the content of the 6-, 7-, or 8-membered lactam to the content of the acetylene glycol-based surfactant is 0.5 or more and less than 5."

The patent was filed on Sept. 12, 2024, u...