ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,522,550, issued on Jan. 13, was assigned to Aditya Birla Chemicals (Thailand) Ltd. (Advanced Materials) (Bangkok).

"Method for preparing a solid form of bisphenol F" was invented by Pradip Kumar Dubey (Mumbai, India), Chandan Kumar Singh (Rayong, Thailand) and Parawee Thanomsup (Rayong, Thailand).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for preparing a solid form of Bisphenol F is disclosed. The method comprises feeding Bisphenol F at a temperature in the range of 130-170deg C. into an extruder; processing the fed Bisphenol F in a first mixing zone of the extruder, the first mixing zone maintained at a temperature in the range of 110-130de...