ALEXANDRIA, Va., Sept. 3 -- United States Patent no. 12,404,754, issued on Sept. 2, was assigned to SAUDI ARABIAN OIL COMPANY (Dhahran, Saudi Arabia).

"Method of measurement of interfacial tension (IFT) of two immiscible fluids at reservoir conditions: an in situ gas buffered injection" was invented by Salah Hamad Al-Saleh (Dhahran, Saudi Arabia), Ahmed Gmira (Al-Khobar, Saudi Arabia) and Ali Abdallah Al-Yousef (Dhahran, Saudi Arabia).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for determining interfacial tension of a hydrocarbon in a brine fluid, the method including injecting a first brine fluid into a test cell, the first brine fluid having an initial ionic composition, injecting a hydrocarbon ...