ALEXANDRIA, Va., July 15 -- United States Patent no. 12,662,438, issued on June 23, was assigned to THE CHEMOURS COMPANY FC LLC (Wilmington, Del.).

"HFO-1234ze and HFO-1234yf compositions and processes for producing and using the compositions" was invented by Sheng Peng (Hockessin, Del.) and Mario Joseph Nappa (Leesburg, Fla.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A fluoropropene composition comprising Z-1,3,3,3-tetrafluoropropene, E-1,3,3,3-tetrafluoropropene, 2,3,3,3-tetrafluoropropene, and optionally 1,1,1,3,3-pentafluoropropane wherein the 2,3,3,3-tetrafluoropropene being present in an amount of 0.001 to 1.0%. A method of producing the fluoropropene, methods for using the fluoropropene and the co...