ALEXANDRIA, Va., Feb. 19 -- United States Patent no. 12,226,271, issued on Feb. 18, was assigned to KURARAY NORITAKE DENTAL INC. (Kurashiki, Japan).
"Coloring solution for zirconia" was invented by Yuta Tajima (Aichi, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention provides a coloring solution for zirconia, which, when used on zirconia before firing of the zirconia, causes the zirconia to exhibit only a slight color difference before and after the firing and thus enables accurate prediction of the post-firing color tone of the zirconia. The present invention relates to a coloring solution for zirconia, comprising: a coloring agent (A) that is decolorized after firing of zirconia; a...