ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,492,303, issued on Dec. 9, was assigned to Agfa-Gevaert NV (Mortsel, Belgium).
"Polythiophene/polyanion compositions" was invented by Roald Herckens (Mortsel, Belgium) and Johan Loccufier (Mortsel, Belgium).
According to the abstract* released by the U.S. Patent & Trademark Office: "A polythiophene dispersion including: (a) a polythiophene copolymer of a first monomer according to Formula I and a second monomer to Formula II, wherein A represents a substituted or unsubstituted C1 to C5 alkylene bridge further functionalized with at least one functional group selected from the group consisting of a sulfonic acid or salt thereof, a phosphonic acid or salt thereof, a phosphate ester or s...