ALEXANDRIA, Va., May 19 -- United States Patent no. 12,631,613, issued on May 19, was assigned to Institute of Geology and Geophysics, Chinese Academy of Sciences (Beijing).
"In situ U-Pb dating method for calcite" was invented by Shitou Wu (Beijing), Yueheng Yang (Beijing), Hao Wang (Beijing), Lei Xu (Beijing), Chao Huang (Beijing) and Liewen Xie (Beijing).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure discloses an in situ U-Pb dating method for calcite, including: cutting a calcite sample to prepare an epoxy resin sample target; placing the sample in a laser ablation sample chamber, and adjusting a position of the sample in an optical axis direction; conducting line scanning ablation ...