ALEXANDRIA, Va., March 31 -- United States Patent no. 12,590,036, issued on March 31, was assigned to KURARAY NORITAKE DENTAL INC. (Kurashiki, Japan).

"Zirconia pre-sintered body suitable for dental use" was invented by Shinichiro Kato (Aichi, Japan) and Atsushi Matsumoto (Aichi, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention provides a zirconia pre-sintered body that exhibits suitable shade, translucency, and strength with short firing. The present invention relates to a zirconia pre-sintered body comprising a multilayer structure including at least three layers containing zirconia and a stabilizer capable of reducing a phase transformation of zirconia, the zirconia comprising pr...