ALEXANDRIA, Va., June 9 -- United States Patent no. 12,649,891, issued on June 9, was assigned to SHELL USA INC. (Houston).
"Grease composition" was invented by Eduard Alexander Worthington (Amsterdam), Matthias Eggenstein (Hamburg, Germany), Alan Richard Wheatley (London) and Christian Biewer (Hamburg, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A grease composition comprising: (i) a mineral base oil containing one or more of fatty ammonium carboxylate salts of formula (I), wherein R1 is selected from C12 to C20 saturated or unsaturated, branched or straight-chain hydrocarbyl groups; X is selected from NH, +NH2 and N-(R4)-NH3+; R2 and R4 are independently selected from C2 to C8 saturated or unsat...