Lubricating oil compositions

Details Lubricating oil compositions Lubricating oil compositions

2003-12-11

2008-08-05

Caldarola, Glenn (Department: 1797)

Solid anti-friction devices, materials therefor, lubricant or se

Lubricants or separants for moving solid surfaces and...

Heterocyclic ring compound; a heterocyclic ring is one...

C508S591000

Reexamination Certificate

active

07407918

ABSTRACT:
A lubricant composition comprising a major amount of baseoil lubricant and a minor amount of lubricant additive. The lubricant additive includes (a) a dispersant containing at least one member selected from hydrocarbyl-substituted succinimides, hydrocarbyl-substituted amines, and Mannich base adducts derived from hydrocarbyl-substituted phenols condensed with an aldehyde and an amine, and (b) a viscosity index improver that includes a substantially linear block copolymer having a number average molecular weight as determined by gel permeation chromatography ranging from about 50,000 to about 250,000. The block copolymer is derived from a conjugated diene monomer containing no less than 5 carbon atoms and a monoalkenylarene monomer, wherein the block copolymer has an aromatic content ranging from about 10 wt. % to about 50 wt. % and an olefinic unsaturation ranging from about 0.5 wt. % to about 5 wt. %.

REFERENCES:
patent: 3554911 (1971-01-01), Schiff et al.
patent: 3653273 (1972-04-01), Albertson et al.
patent: 3668125 (1972-06-01), Anderson
patent: 3700633 (1972-10-01), Wald et al.
patent: 3772196 (1973-11-01), St. Clair et al.
patent: 3775329 (1973-11-01), Eckert
patent: 3827999 (1974-08-01), Crossland
patent: 3835053 (1974-09-01), Meier et al.
patent: 3948843 (1976-04-01), Saint-Pierre et al.
patent: 3965019 (1976-06-01), St. Clair et al.
patent: 4073737 (1978-02-01), Elliott
patent: 4081390 (1978-03-01), Richardson
patent: 4162985 (1979-07-01), Holubec
patent: 4234435 (1980-11-01), Meinhardt
patent: 4418234 (1983-11-01), Schiff et al.
patent: 4605808 (1986-08-01), Samson
patent: 4620048 (1986-10-01), Ver Strate et al.
patent: 4780228 (1988-10-01), Gardiner et al.
patent: 5112508 (1992-05-01), DeRosa et al.
patent: 5137980 (1992-08-01), DeGonia et al.
patent: 5238588 (1993-08-01), Nalesnik et al.
patent: 5294354 (1994-03-01), Papke et al.
patent: 5393309 (1995-02-01), Cherpeck
patent: 5620486 (1997-04-01), Cherpeck
patent: 5637783 (1997-06-01), Brandes et al.
patent: 5641731 (1997-06-01), Baumgart et al.
patent: 5652201 (1997-07-01), Papay et al.
patent: 5681797 (1997-10-01), Lawate
patent: 5789353 (1998-08-01), Scattergood
patent: 5814586 (1998-09-01), Boden et al.
patent: 5888947 (1999-03-01), Lambert et al.
patent: 5958848 (1999-09-01), Robson
patent: 6107257 (2000-08-01), Valcho et al.
patent: 6187721 (2001-02-01), Goldblatt et al.
patent: 6232279 (2001-05-01), Steigerwald
patent: 6300444 (2001-10-01), Tokumoto et al.
patent: 6303550 (2001-10-01), Wedlock et al.
patent: 6365558 (2002-04-01), Lal
patent: 6503872 (2003-01-01), Tomaro
patent: 6525149 (2003-02-01), Baxter et al.
patent: 6548458 (2003-04-01), Loper
patent: 6627584 (2003-09-01), Ozbalik
patent: 0 307 132 (1989-03-01), None
patent: 0 837 122 (1998-04-01), None
patent: 1 318 189 (2003-06-01), None
patent: 2048935 (1980-12-01), None
patent: 2002-220597 (2002-08-01), None
patent: 2004-107645 (2004-04-01), None
Engineering Plastics Network, copy of web page from EnplaNet.com, “Septon™:High Performance Thermoplastic Rubber,” Dec. 11, 2003.

Affiliated with

Also associated with

Rating

Lubricating oil compositions does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Lubricating oil compositions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lubricating oil compositions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4017966