US Patent Issued to Ivoclar Vivadent on Dec. 2 for "Multi-coloured blank for dental purposes" (Austrian, Liechtensteiner, Swiss Inventors)

ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,484,996, issued on Dec. 2, was assigned to Ivoclar Vivadent AG (Schaan, Liechtenstein).

"Multi-coloured blank for dental purposes" was invented by Jurgen Seger (Vaduz, Liechtenstein), Harald Burke (Bardella, Austria), Sebastian Krolikowski (Lachen, Switzerland) and Frank Rothbrust (Rons, Austria).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a blank for dental purposes which has a first and a second layer which, independently of each other, are based on glass, glass-ceramic or ceramic, wherein the first layer and the second layer differ in colour and form a boundary surface, wherein the boundary surface runs obliquely." ...