ALEXANDRIA, Va., June 16 -- United States Patent no. 12,304,106, issued on May 20, was assigned to James R. Glidewell Dental Ceramics Inc. (Newport Beach, Calif.).

"Pressure casting of submicron ceramic particles and methods of ejection" was invented by Hugo Gonzalez (Whittier, Calif.), Sreeram Balasubramanian (Irvine, Calif.) and Mathew David Campbell (Tustin, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Methods and apparatus are provided for pressure casting ceramic bodies. Methods and apparatus are provided for rapid ejection of cast ceramic bodies from a mold. A mold is described that has an impermeable cavity surface to provide dry release of the cast body. Ceramic bodies produced by the method...