ALEXANDRIA, Va., March 31 -- United States Patent no. 12,590,251, issued on March 31, was assigned to ExxonMobil Chemical Patents Inc. (Baytown, Texas).
"Controlling mesophase softening point and production yield by varying solvent SBN via solvent deasphalting" was invented by Yifei Liu (Houston), Teng Xu (Houston), Stephen T. Cohn (Spring, Texas) and Jeffrey C. Yeh (Houston).
According to the abstract* released by the U.S. Patent & Trademark Office: "A process for producing mesophase pitch, the process including: contacting an isotropic pitch with a solvent under conditions sufficient to produce a solvent fraction comprising the solvent and an insoluble fraction comprising mesophase pitch; and recovering the mesophase pitch, wherein the ...