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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Cengel; John A.
Address:
Wheaton, IL
No. of patents:
14
Patents:












Patent Number Title Of Patent Date Issued
4940552 Passivation of polyamine dispersants toward fluorohydrocarbon compositions July 10, 1990
Dispersants containing basic amine groups are passivated toward fluorohydrocarbon compositions by reaction with a passivating amount of a dicarboxylic acid or anhydride.
4514190 Synthetic fuel composition April 30, 1985
A lubricant and fuel composition comprising di-n-hexyl 1,3-cyclohexanedicarboxylate.
4464277 Synthetic lubricant composition August 7, 1984
A lubricant and fuel composition comprising di-n-hexyl 1,3-cyclohexanedicarboxylate.
4455244 Oxidized mannich condensation product June 19, 1984
An oxidized Mannich condensation product of an oxidized olefin polymer, amine and formaldehyde yielding reactant and lube oils containing these products.
4379064 Oxidative passivation of polyamine-dispersants April 5, 1983
Mild oxidation of polyamine crankcase dispersants passivates basically reacting polyamine dispersants to fluorocarbon compositions used in engines.
4086251 Process for manufacturing polyalkenyl succinic anhydrides April 25, 1978
A process for producing alkenyl substituted anhydrides which comprises introducing one mole of polypropene or polybutene having a number average molecular weight of 200-3000, 0.8-5.0 moles of the anhydride of an unsaturated dicarboxylic acid and 5-200 ppm of an additive which suppres
4029592 Polybutene composition and use thereof June 14, 1977
Viscous polybutenes of number average molecular weight (M.sub.n) in the range of about 300 to about 3000 have improved reactivity with intramolecular anhydrides of unsaturated aliphatic dicarboxylic acids when such polybutenes contain rather small amounts, i.e., 5 to 200 ppm, of halo
4028264 Polybutene composition containing halo-carbonyl additives and use thereof June 7, 1977
Viscous polybutenes of number average molecular weight (M.sub.n) in the range of about 300 to about 3000 have improved reactivity with intramolecular anhydrides of unsaturated aliphatic dicarboxylic acids when reacted in the presence of rather small amounts, i.e., 5 to 200 ppm, of al
4008168 Polybutene composition containing halogen-containing additives and use thereof February 15, 1977
Viscous polybutenes of number average molecular weight (M.sub.n) in the range of about 300 to about 3000 have improved reactivity with intramolecular anhydrides of unsaturated aliphatic dicarboxylic acids when such polybutenes contain rather small amounts, i.e., 5 to 200 ppm, of halo
3985672 Polybutene composition containing brominated dialkylhydantoin additive and use thereof October 12, 1976
Viscous polybutenes of number average molecular weight (M.sub.n) in the range of about 300 to about 3000 have improved reactivity with intramolecular anhydrides of unsaturated aliphatic dicarboxylic acids when such polybutenes contain rather small amounts, i.e., 5 to 200 ppm, of brom
3960900 Polybutenylsuccinic anhydride production June 1, 1976
Viscous polybutenes of number average molecular weight (M.sub.n) in the range of about 300 to about 3000 have improved reactivity with intramolecular anhydrides of unsaturated aliphatic dicarboxlyic acids when such polybutenes contain rather small amounts, i.e., 5 to 200 ppm, of halo
3954812 Polybutene composition containing halogen-containing additives and use thereof May 4, 1976
Viscous polybutenes of number average molecular weight (M.sub.n) in the range of about 300 to about 3000 have improved reactivity with intramolecular anhydrides of unsaturated aliphatic dicarboxylic acids when such polybutenes contain rather small amounts, i.e., 5 to 200 ppm, of halo
3953475 Polybutene composition containing halo-carbonyl additives April 27, 1976
Viscous polybutenes of number average molecular weight (M.sub.n) in the range of about 300 to 3000 have improved reactivity with intramolecular anhydrides of unsaturated aliphatic dicarboxylic acids when reacted in the presence of rather small amounts, i.e., 5 to 200 ppm, of alpha ha
3935249 Tar reduction by inorganic halide for reaction of unsaturated anhydride and polybutene January 27, 1976
Viscous polybutenes of number average molecular weight (M.sub.n) in the range of about 300 to about 3,000 have improved reactivity with intramolecular anhydrides of unsaturated aliphatic dicarboxylic acids when reacted in the presence of rather small amounts, i.e., 5 to 200 ppm, of i










 
 
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