ALEXANDRIA, Va., Nov. 6 -- United States Patent no. 12,460,095, issued on Nov. 4, was assigned to SOCIETE BIC (Clichy, France).
"Washable ink composition" was invented by Carine Bethouart (Clichy, France).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention concerns a washable aqueous ink composition comprising: a) at least one alkali metal salt of citrate, b) at least one cyclodextrin or derivative thereof, c) at least one dye. It also concerns a writing instrument comprising it and the use of the association of a) at least one alkali metal salt of citrate and b) at least one cyclodextrin or derivative thereof, to improve the washability and/or vividness of the shades of a washable aqueous in...