US Patent Issued to Ivoclar Vivadent on March 4 for "Pre-sintered multi-layered dental mill blank, process for preparing the same, and uses thereof, and a sintering process" (Swiss, Austrian, German Inventors)

ALEXANDRIA, Va., March 5 -- United States Patent no. 12,239,500, issued on March 4, was assigned to Ivoclar Vivadent AG (Schaan, Liechtenstein).

"Pre-sintered multi-layered dental mill blank, process for preparing the same, and uses thereof, and a sintering process" was invented by Frank Rothbrust (Rons, Austria), Sasa Lukic (Lindau, Germany), Christian Ritzberger (Grabs, Switzerland) and Corina Serban (Goldach, Switzerland).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a pre-sintered multi-layered dental mill blank comprising a top layer, a bottom layer, and at least one intermediate layer. The pre-sintered multi-layered dental mill blank or a part prepared thereof has one o...