US Patent Issued to INSTITUT STRAUMANN on June 30 for "Glass ceramics and methods of making such" (Swedish, Chinese Inventors)

ALEXANDRIA, Va., July 16 -- United States Patent no. 12,668,527, issued on June 30, was assigned to INSTITUT STRAUMANN AG (Basel, Switzerland).

"Glass ceramics and methods of making such" was invented by Wei Xia (Uppsala, Sweden), Le Fu (Hunan, China) and Hakan Engqvist (Uppsala, Sweden).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a glass ceramic material comprising a core-rim structure, wherein the core-rim structure comprises an amorphous SiO2 matrix, ZrO2 crystals, and hardness-enhancing additive, the ZrO2 crystals are present in cores that are at least partly surrounded by a rim comprising hardness-enhancing additive."

The patent was filed on Feb. 17, 2021, under Appli...