US Patent Issued to SEIKO EPSON on May 13 for "Ink set and recording method" (Japanese Inventors)

ALEXANDRIA, Va., June 12 -- United States Patent no. 12,297,364, issued on May 13, was assigned to SEIKO EPSON Corp. (Japan).

"Ink set and recording method" was invented by Keigo Ando (Matsumoto, Japan) and Mitsuaki Kosaka (Minowa, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An ink set includes a non-white ink composition and a white ink composition, and the non-white ink composition and the white ink composition are each an aqueous ink jet ink. The non-white ink composition contains a silicone-based surfactant A having a maximum peak within a molecular weight range of 3,000 to 20,000 within a molecular weight range of 300 or more in a molecular weight distribution in gel permeation chromatography, ...