ALEXANDRIA, Va., July 30 -- United States Patent no. 12,374,878, issued on July 29, was assigned to SAUDI ARABIAN OIL COMPANY (Dhahran, Saudi Arabia).

"Method of estimating relative humidity in a machine" was invented by Nasser Monif Alotaibi (Dhahran, Saudi Arabia), Ali Ahmed Alameer (Saihat, Saudi Arabia) and Zeyad Tariq Balkhyour (Dammam, Saudi Arabia).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for estimating relative humidity inside an electrical machine includes determining a measured rate of change (ROC) of temperature inside an electrical machine. A ratio of the measured ROC to a reference ROC is calculated, where the ratio is equal to an average specific heat of the electrical machine. Th...