ALEXANDRIA, Va., July 9 -- United States Patent no. 12,351,721, issued on July 8, was assigned to SEIKO EPSON Corp. (Japan).
"Ink jet recording method" was invented by Emi Takeuchi (Shiojiri, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An ink jet recording method includes a step of ejecting a radiation curable ink jet composition on a recording medium and a step of emitting radiation rays to the recording medium, the ink jet composition contains a colorant and a thioxanthone-based photopolymerization initiator, the colorant includes neither a yellow-based colorant nor a black-based colorant, and emission energy of the radiation rays is set to 900 mJ/cm2 or more per one emission."
The patent was fil...