ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,522,739, issued on Jan. 13, was assigned to DNP FINE CHEMICALS Co. LTD. (Yokohama, Japan).
"Ink composition" was invented by Fumie Yamazaki (Yokohama, Japan), Yukiko Ishima (Yokohama, Japan), Ryosuke Kotani (Yokohama, Japan) and Ryoma Yasui (Yokohama, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An ink composition has a high storage stability such that decomposition of the components contained in the ink composition can be minimized. This ink composition, which is discharged by using the inkjet method, contains a luminescent pigment, and the amount of hydrogen generated per 100 g of the ink composition measured in a room temperature and normal p...