Solid anti-friction devices – materials therefor – lubricant or se – Lubricants or separants for moving solid surfaces and... – Nitrogen and heavy metal – or nitrogen and aluminum – in the...
Reexamination Certificate
2007-02-27
2007-02-27
Thexton, Matthew A. (Department: 1714)
Solid anti-friction devices, materials therefor, lubricant or se
Lubricants or separants for moving solid surfaces and...
Nitrogen and heavy metal, or nitrogen and aluminum, in the...
C508S364000, C508S365000, C508S371000, C508S372000, C508S373000, C508S374000, C508S375000, C508S376000, C508S378000, C508S443000, C508S444000
Reexamination Certificate
active
10666356
ABSTRACT:
A lubricating oil with very low phosphorus content, and having long life as evidenced by a reduction in viscosity increase, oxidation and nitration, comprises a major amount of a base oil of lubricating viscosity and a minor amount of a mixture of neutral and overbased metallic detergents, at least a zinc dialkyldithiocarbamate and a zinc dialkyldithiophosphate antiwear additive and at least a dihydrocarbylthiocarbamoyl.
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ExxonMobil Research and Engineering Company
Foss Norby
Katz Gary P.
Thexton Matthew A.
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