GENEVA, March 30 -- OTSUKA CHEMICAL CO., LTD. (2-27, Otedori 3-chome, Chuo-ku, Osaka-shi, Osaka5400021), 大塚化学株式会社 (大阪府大阪市中央区大手通三丁目２番２７号) filed a patent application (PCT/JP2025/030313) for "BLOCK COPOLYMER, DISPERSANT, AND COLORING COMPOSITION" on Aug 28, 2025. With publication no. WO/2026/063162, the details related to the patent application was published on Mar 26, 2026.
Notably, the patent application was submitted under the International Patent Classification (IPC) system, which is managed by the World Intellectual Property Organization (WIPO)....