US Patent Issued to Schlumberger Technology on July 28 for "Heat treatment of nanodiamond particles with controlled powder layer depth" (Utah Inventor)

ALEXANDRIA, Va., July 28 -- United States Patent no. 12,692,437, issued on July 28, was assigned to Schlumberger Technology Corp. (Sugar Land, Texas).

"Heat treatment of nanodiamond particles with controlled powder layer depth" was invented by Yahua Bao (Provo, Utah).

According to the abstract* released by the U.S. Patent & Trademark Office: "Luminescent diamond is made by creating vacancies in diamond grains and heat treating the diamond grains by controlling a thickness of the diamond grains on a substrate. The heat treatment may occur in a temperature range that does not burn the diamond grains, and the controlled thickness produces an even color change and/or promotes oxygen terminations on the diamond particle surfaces."

The patent ...