Solid anti-friction devices – materials therefor – lubricant or se – Lubricants or separants for moving solid surfaces and... – Organic sulfur compound – wherein the sulfur is single bonded...
Reexamination Certificate
2011-06-07
2011-06-07
Caldarola, Glenn A (Department: 1771)
Solid anti-friction devices, materials therefor, lubricant or se
Lubricants or separants for moving solid surfaces and...
Organic sulfur compound, wherein the sulfur is single bonded...
C508S192000, C508S291000, C508S375000, C508S574000
Reexamination Certificate
active
07956021
ABSTRACT:
A lubricating oil composition comprising a base oil of lubricating viscosity having a kinematic viscosity of 22 to 300 mm2/s at 40° C. and dissolved or dispersed therein the following additives in the following amounts based on a total amount of the lubricating oil composition:(1) an overbased sulfurized alkylphenol calcium salt detergent in an amount of 0.5 to 1.0 wt. % in terms of calcium content,(2) an overbased calcium alkylbenzenesulfonate detergent in an amount of 1.5 to 2.1 wt. % in terms of calcium content,(3) a nitrogen-containing ashless dispersant in an amount of 0.005 to 0.1 wt. % in terms of nitrogen content, and(4) a zinc dihydrocarbyldithiophosphate in an amount of 0.007 to 0.1 wt. % in terms of phosphorus content,wherein the weight ratio of the overbased sulfurized alkylphenol calcium salt detergent to the overbased calcium alkylbenzenesulfonate detergent is in the range of 22:78 to 37:63 in terms of calcium content and wherein the lubricating oil composition has a total base number of 60 to 100 mg·KOH/g. The lubricating oil composition of the present invention demonstrates high temperature wear and scuffing performance.
REFERENCES:
patent: 4948522 (1990-08-01), Dunn et al.
patent: 6310011 (2001-10-01), Karn et al.
patent: 6551965 (2003-04-01), Nagamatsu et al.
patent: 2001/0019999 (2001-09-01), Nagamatsu et al.
patent: WO 96/20265 (1996-07-01), None
patent: WO 97/46646 (1997-12-01), None
patent: WO 2005/112575 (2005-12-01), None
International Search Report issued in counterpart European Patent Application No. 06256564.3-2104.
International Search Report issued in counterpart Singapore Patent Application No. 200608986-6.
Caldarola Glenn A
Chevron Japan Ltd.
Vasisth Vishal
LandOfFree
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