US Patent Issued to Afton Chemical on May 26 for "Hydrolytically stable hydraulic lubricant" (British Inventors)

ALEXANDRIA, Va., May 26 -- United States Patent no. 12,637,632, issued on May 26, was assigned to Afton Chemical Corp. (Richmond, Va.).

"Hydrolytically stable hydraulic lubricant" was invented by Ralph Lumby (Surrey, Great Britain) and Helen Dyer (Bracknell, Great Britain).

According to the abstract* released by the U.S. Patent & Trademark Office: "Lubricant compositions may provide corrosion resistance, oxidation resistance, and reduced wear for hydraulic systems. A lubricant composition may comprise an ashless dithiophosphate in an amount sufficient to provide a concentration of phosphorus ranging from 10 ppm to 250 ppm to the lubricant composition, a metal dialkyl dithiophosphate such as zinc dialkyl dithiophosphate (ZDDP) in an amount...