ALEXANDRIA, Va., April 15 -- United States Patent no. 12,600,874, issued on April 14, was assigned to Schwan-Stabilo Cosmetics GmbH & Co. KG (Heroldsberg, Germany).
"Aqueous pigmented ink" was invented by Lukas Wolf (Weidenberg, Germany), Julia Scharschinger (Wiesenttal, Germany) and Ingolf Kahle (Ruckersdorf, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "An aqueous pigmented ink for use in a capillary reservoir system comprises at least one pigment, at least one water-dispersible, film-forming component, about 0.5 to about 4.5 wt % of at least one suspension substance and about 0.01 to about 0.5 wt % of a gel former combination in an aqueous vehicle, the gel former combination comprising at least o...