Lubricant compositions

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

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C508S379000

Reexamination Certificate

active

06953771

ABSTRACT:
A lubricating oil composition comprising, or made by mixing, a major amount of an oil of lubricating viscosity and a minor amount of at least one compound comprising a polynuclear molybdenum core having bonded thereto one or more monoanionic ligands capable of rendering the compound oil-soluble or oil-dispersible, and further comprising at least one ionic species that is not required to confer oil-solubility or oil-dispersibility to the compound, wherein the combination of said one or more monoanionic ligands and said at least one ionic species confers electrical neutrality to the compound and wherein the ratio of the number of molybdenum atoms in the core to the number of said ligands is greater than 1:1.

REFERENCES:
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patent: 4995996 (1991-02-01), Coyle et al.
patent: 5627146 (1997-05-01), Tanaka et al.
patent: 5824627 (1998-10-01), McConnachie et al.
patent: 5837657 (1998-11-01), Fang et al.
patent: 5888945 (1999-03-01), Stiefel et al.
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patent: 6143701 (2000-11-01), Boffa
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patent: WO98/26030 (1998-06-01), None
patent: WO99/47629 (1999-09-01), None
patent: WO99/66013 (1999-12-01), None
“Preparation of Complexes Containing the [Mo3S(S2)3]4+Core and Structure of Tris(diethyldithiocarbamato)tris(μ3-thio)-triangulo-trimolybdenum(IV) Iodine”, Zimmerman et al., Inorg, Chem. 1991, 30, 4336-4341.

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