ATBECHDEDKESFRGBGRITLILUNLSEMCPTIESILTLVFIROMKCYALTRBGCZEE....SK................JDIM350 (Ver 2.1 Jan 2001) 1620000/01308496EUROPEAN PATENT APPLICATIONA320030528EP02257642.520021105EnEnEn33293220011106US20030528200322200305072003197 7C 10M 141/10 A 7C 10M 167/00 B 7C 10M 141/10 J 7C 10M 133:44 J 7C 10M 135:36 J 7C 10M 137:02 J 7C 10M 167/00 K 7C 10M 125:24 K 7C 10M 133:44 K 7C 10M 133:52 K 7C 10M 133:56 K 7C 10M 135:36 K 7C 10M 137:02 K 7C 10M 137:10 K 7C 10M 145:14 K 7C 10M 159:16 K 7C 10M 159:24 K 7C 10N 30:06 Z 7C 10N 40:04 Z // (C10M141/10, 133:44, 135:36, 137:02),(C10M167/00, 125:24, 133:44, 133:52, 133:56, 135:36, 137:02, 137:10, 145:14, 159:16, 159:24), C10N30:06, C10N40:04deFlüssigkeit für Getriebe mit veringerter RostfrasskorrosionenTramsmission fluids exhibiting reduced pittingfrFluide de transmission présentant une formmation reduite de piqûreThe Lubrizol Corporation (an Ohio corporation)00475401P015433EP DCLubrizol Corporation (an Ohio corporation), The29400 Lakeland BoulevardWickliffe Ohio 44092-2298USSumiejski, J.L.8012 Hackberry DriveMentor, Ohio 44060USWard, William C.Jr.4600 Bridgewater AvenuePerry, Ohio 44081USCrisp, David Normanet al00052071D. YOUNG & CO. 21 New Fetter LaneLondon EC4A 1DAGBATBEBGCHCYCZDEDKEEESFIFRGBGRIEITLILUMCNLPTSESKTRALLTLVMKROSI20030528200322

Compounds comprising a 5-membered ring containing at least two double bonded nitrogen atoms can be used to impart improved metal pitting performance to a transmission fluid. The fluid includes an oil of lubricating viscosity and a hydrocarbyl ester of a phosphorous acid and is preferably limited to 0 to 0.1 percent by weight of zinc salts of sulfur-containing phosphorus acids.