ALEXANDRIA, Va., Dec. 23 -- United States Patent no. 12,503,614, issued on Dec. 23, was assigned to NIPPON SHOKUBAI Co. LTD. (Osaka, Japan).
"Resin emulsion for water-based ink" was invented by Takumi Ito (Suita, Japan) and Yoshimine Sakamoto (Suita, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A resin emulsion to be used in a water-based ink, wherein the resin emulsion for a water-based ink is characterized by containing emulsion particles and a carboxylic acid polymer non-metal salt and by the emulsion particles containing a polymer comprising a monomer component including a nitrogen atom-containing monomer; and a resin emulsion for a water-based ink that can be used suitably in the water-based ink...