ALEXANDRIA, Va., April 7 -- United States Patent no. 12,595,212, issued on April 7, was assigned to Council of Agriculture, Executive Yuan (Taipei, Taiwan).

"Two-stage sintering method for preparing porous biphasic calcium phosphate ceramic from calcium-containing biological waste" was invented by Wen-Fu Ho (Kaohsiung, Taiwan), Hsueh-Chuan Hsu (Taichung, Taiwan) and Shih-Ching Wu (Taichung, Taiwan).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a two-stage sintering method for preparing a porous biphasic calcium phosphate ceramic from calcium-containing biological waste, wherein hydroxyapatite prepared from calcium-containing waste is mixed with a foaming agent to prepare a bo...