Solid anti-friction devices – materials therefor – lubricant or se – Lubricants or separants for moving solid surfaces and... – Heavy metal or aluminum in an organic phosphorus compound...
Reexamination Certificate
2003-06-05
2008-12-09
Griffin, Walter D (Department: 1797)
Solid anti-friction devices, materials therefor, lubricant or se
Lubricants or separants for moving solid surfaces and...
Heavy metal or aluminum in an organic phosphorus compound...
C508S346000, C508S354000, C508S368000
Reexamination Certificate
active
07462583
ABSTRACT:
Internal combustion engines exhibit improved efficiency of the emissions control system by using a lubricating oil composition of a base oil, an alkali or alkaline earth metal-containing detergent; a metal salt of one or more phosphorus-containing compounds represented by the formula (I), wherein X1and X2are independently O or S, and R1and R2are independently hydrocarbyl groups, the average total number of carbon atoms in R1and R2for the one or more phosphorus-containing compounds being at least 10.4; and an acylated nitrogen-containing compound having at least about 10 alphatic carbon atoms and a TBN of at least about 2; the lubricating oil composition being characterized by a phosphorus concentration of up to about 0.12% by weight and the substantial absence of copper, thereby generating a lean-phosphorus containing exhaust gas.
REFERENCES:
patent: 5726132 (1998-03-01), Roby et al.
patent: 5919740 (1999-07-01), Bloch
patent: 2002/0151442 (2002-10-01), Bardasz et al.
patent: 1 167 497 (2002-01-01), None
patent: 1 203 806 (2002-05-01), None
“Balancing Crankcase Lubricant Performance with Catalyst Life,” Chamberlin et al., SAE Technical Paper Series 841407, Oct. 8-11, 1984.
“Development and Significance of the Phosphorus Emission Index of Engine Oils,” Selby, 13thInternational Colloquium Tribology—Lubricants, Materials and Lubrication Technische Akademie Esslingen, Stuttgart, Germany, Jan. 15-17, 2002 (accessed at http://www.savantgroup.com/PhosIndex-v2.pdf, site updated Jan. 2003).
Abraham William D.
Chamberlin, III William B.
Kelley Jack C.
Wilk Melody A.
Griffin Walter D
Hilker Christopher D.
Seifu Lessanework T
Shold David M.
The Lubrizol Corporation
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