US RE38,929 E1 | ||
Lubricant containing molybdenum compound and secondary diarylamine | ||
Vincent James Gatto, Baton Rouge, La. (US); and Mark Thomas Devlin, Richmond, Va. (US) | ||
Assigned to Afton Chemical Intangibles LLC, Richmond, Va. (US) | ||
Filed on Jun. 26, 2000, as Appl. No. 9/604,285. | ||
Application 08/559879 is a continuation of application No. 09/359770, filed on Jul. 22, 1999, granted, now Re. 37363. | ||
Application 09/604285 is a reissue of application No. 08/559879, filed on Nov. 20, 1995, now 5,650,381, filed on Jul. 22, 1997. | ||
This patent is subject to a terminal disclaimer. | ||
Int. Cl. C10M 141/02 (2006.01); C10M 141/06 (2006.01); C10M 141/12 (2006.01) |
U.S. Cl. 508—364 | 55 Claims |
[ 22. A lubricating composition comprising:
a major amount of lubricating oil,
at least one oil soluble molybdenum compound that is free of phosphorus and free of active sulfur, and
at least one oil soluble secondary diarylamine,
wherein the ratio of molybdenum provided by said oil soluble molybdenum compound relative to said oil soluble secondary diarylamine
is about 0.02 to 0.6 parts by weight molybdenum per part of said second diarylamine, said oil soluble secondary diarylamine is present in an amount
of about 750 to about 5,000 parts per million of said lubricating composition, said oil soluble molybdenum compound and said secondary diaryl amine are
present in an effective antioxidant amount, provided said oil soluble molybdenum compound is present in an amount so as to
provide greater than about 100 ppm molybdenum based on the weight of said lubricating composition.]
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