Solid anti-friction devices – materials therefor – lubricant or se – Lubricants or separants for moving solid surfaces and... – Organic compound containing boron
Reexamination Certificate
2005-11-08
2005-11-08
McAvoy, Ellen M (Department: 1764)
Solid anti-friction devices, materials therefor, lubricant or se
Lubricants or separants for moving solid surfaces and...
Organic compound containing boron
C508S287000, C508S322000, C508S433000, C508S441000, C508S591000
Reexamination Certificate
active
06962895
ABSTRACT:
This invention relates to a lubricating composition comprising at least about 30% by weight at least one mineral oil, having a kinematic viscosity of less than about 8 cSt at 100° C., (A) from about 15% to about 40% by weight of at least one polymer, and (B) up to about 30% by weight of at least one fluidizing agent, provided that when the fluidizing agent is a polyα-olefin having a kinematic viscosity from about 2 to about 30 cSt at 100° C., then the polyα-olefin is present in an amount up to about 12% by weight, wherein the lubricating composition has a shear loss of less than about 15% in the 20 hour taper bearing shear test. The invention also relates to concentrates used in preparing lubricating compositions. The present combination of components provides good low and high temperature properties especially when used in combination with one or more mineral oils. In one aspect, the compositions provide improved oxidation resistance.
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Derwent Abstract WPI Acc No. 70-72175R/197040 for DE 1913539.
FSG006 960628; Singapore Search Report.
Richardson Robert C.
Roell, Jr. Bernard C.
Scharf Curtis R.
Esposito Michael P.
Gilbert Terence
McAvoy Ellen M
The Lubrizol Corporation
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