US Patent Issued to artience, TOYOCOLOR on April 21 for "Pigment composition, coloring composition, paint, ink, ink set, printed article, and packaging material" (Japanese Inventors)

ALEXANDRIA, Va., April 21 -- United States Patent no. 12,606,707, issued on April 21, was assigned to artience Co. Ltd. (Tokyo) and TOYOCOLOR Co. LTD. (Tokyo).

"Pigment composition, coloring composition, paint, ink, ink set, printed article, and packaging material" was invented by Takayoshi Kono (Tokyo), Kohei Takijiri (Tokyo), Takeshi Matsumoto (Tokyo) and Shohei Sakamoto (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "The pigment composition contains the isoindoline compound represented by formula (1) below and the isoindoline compound represented by formula (2) below. In the formulae (1) and (2), R1 to R4 represent hydrogen atoms, R5 and R6 each independently represent alkyl groups, andA' represent ...