US Patent Issued to Ivoclar Vivadent on March 17 for "Lithium silicate glass ceramic with easy machinability" (Swiss Inventor)

ALEXANDRIA, Va., March 17 -- United States Patent no. 12,577,149, issued on March 17, was assigned to Ivoclar Vivadent AG (Schaan, Liechtenstein).

"Lithium silicate glass ceramic with easy machinability" was invented by Christian Ritzberger (Grabs, Switzerland).

According to the abstract* released by the U.S. Patent & Trademark Office: "A lithium silicate glass ceramic having lithium metasilicate as main crystal phase and having not more than 30 wt.-% of lithium metasilicate crystals and having the following components in the amounts indicated:ComponentWt.-%SiO271.0 to 82.0Li2O6.0 to 14.0MeI2O4.0 to 15.0Al2O32.0 to 10.0P2O50.5 to 7.0, wherein MeI2O is selected from Na2O, K2O, Rb2O, Cs2O and mixtures thereof, and wherein the molar ratio of...