US Patent Issued to Afton Chemical on March 3 for "Thiophosphate esters as antiwear additives for lubricants" (Virginia Inventor)

ALEXANDRIA, Va., March 3 -- United States Patent no. 12,565,625, issued on March 3, was assigned to Afton Chemical Corp..

"Thiophosphate esters as antiwear additives for lubricants" was invented by Darryl Williams (Glen Allen, Va.).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure relates to the discovery of certain ashless antiwear additives in the form of dialkyl dithiophosphate triester compounds having specific oxygen ester moieties and a specific sulfur ester moiety that combine to provide an antiwear additive that achieves performance in lubricants without the need for (or with reduced levels of) metals provided by more traditional metal-based antiwear additives. Thus, the ashless an...