ALEXANDRIA, Va., Sept. 10 -- United States Patent no. 12,412,309, issued on Sept. 9, was assigned to Saudi Arabian Oil Co. (Dhahran, Saudi Arabia).

"Chemical purity assessment by image analysis" was invented by Matteo Leoni (Dhahran, Saudi Arabia), Salman J. Al-Khaldi (Dhahran, Saudi Arabia), Rafael M. Pino (Al Khobar, Saudi Arabia) and Juan Carlos Rojas (Dhahran, Saudi Arabia).

According to the abstract* released by the U.S. Patent & Trademark Office: "Systems and methods include a method for determining the purity of a sample. An image capture is performed of a reference material having a known purity and an unknown material having an unknown purity for which a priori information is known, including that the reference material and the u...