ALEXANDRIA, Va., June 18 -- United States Patent no. 12,325,814, issued on June 10, was assigned to SCHLUMBERGER TECHNOLOGY Corp. (Sugar Land, Texas).
"Luminescent diamond" was invented by J. Daniel Belnap (Provo, Utah).
According to the abstract* released by the U.S. Patent & Trademark Office: "Luminescent diamond is made by subjecting a volume of diamond grains to high-pressure/high-temperature conditions with or without a catalyst to cause the grains to undergo plastic deformation to produce nitrogen vacancy defects in the diamond grains, increasing the luminescent activity/intensity of the resulting diamond material. The consolidated diamond material may be further treated to further increase luminescent activity/intensity, which trea...