1
James J Harrison, William R Ruhe Jr: Dispersant terpolymers. Chevron Chemical Corporation, Ernest A Schaal, August 11, 1998: US05792729 (78 worldwide citation)

A terpolymer having an average M.sub.n of from 600 to 100,000 is obtained by the terpolymerization of a 1-olefin having from 10 to 30 carbon atoms, maleic anhydride, and a 1,1 -disubstituted polyisobutylene having an average M.sub.n of from 500 to 5,000.


2
James J Harrison, William R Ruhe Jr: Polyalkylene succinimides and post-treated derivatives thereof. Chevron Chemical Company, Ernest A Schaal, February 10, 1998: US05716912 (55 worldwide citation)

A succinimide composition is prepared by reacting a mixture of an alkenyl or alkylsuccinic acid derivative, an unsaturated acidic reagent copolymer, and a polyamine under reactive conditions; then treating the reaction product with either a cyclic carbonate or a linear mono- or polycarbonate or boro ...


3
Stuart H Brown: Grease composition with improved antiwear properties. Chevron Chemical Company, Ernest A Schaal, June 24, 1997: US05641730 (55 worldwide citation)

An antiwear additive has an alkali metal borate; and a thiadiazole compound. That thiadiazole compound may be a 2,5-dimercapto-1,3,4-thiadiazole, a 2-alkylpolythio-5-mercapto-1,3,4-thiadiazole, or a 2-alkylestermercapto-5-mercapto-1,3,4-thiadiazole. If the thiadiazole compound is a 2-alkylpolythio-5 ...


4
Thomas V Harris, Curt B Campbell, Mohammed M Habib: Process for producing an alkylated, non-oxygen-containing aromatic hydrocarbon. Chevron Chemical Company, Ernest A Schaal, July 13, 1999: US05922922 (45 worldwide citation)

An alkylated aromatic hydrocarbon is produced having the following properties: (a) less than 40 wt. % of the alkylated aromatic hydrocarbon is 2-aryl; and (b) at least 20 wt. % of the alkylated aromatic hydrocarbon is a monoalkylate. That alkylated aromatic hydrocarbon is produced by isomerizing a n ...


5
James J Harrison, William R Ruhe Jr: Dispersant compositions having polyalkylene succinimides. Chevron Chemical Company, Ernest A Schaal, December 22, 1998: US05851965 (44 worldwide citation)

A succinimide composition is prepared by reacting a mixture of an alkenyl or alkylsuccinic acid derivative, an unsaturated acidic reagent copolymer, and a polyamine under reactive conditions. The alkenyl or alkyl substituent of the alkenyl or alkylsuccinic acid derivative has a Mn of from 1000 to 50 ...


6
James J Harrison, William R Ruhe Jr: Polymeric dispersants having polyalkylene and succinic groups. Chevron Chemical Company, Ernest A Schaal, April 1, 1997: US05616668 (42 worldwide citation)

Novel copolymers of unsaturated acidic reactants and high molecular weight olefins are useful as dispersants in lubricating oils and fuels and also may be used to prepare polysuccinimides and other post-treated additives useful in lubricating oils and fuels. The ratio of anhydride groups to the hydr ...


7
James J Harrison, William R Ruhe Jr: Fuel compositions having polyalkylene succinimides and preparation thereof. Chevron Chemical Company, Ernest A Schaal, December 29, 1998: US05853434 (42 worldwide citation)

A succinimide composition is prepared by reacting a mixture of an alkenyl or alkylsuccinic acid derivative, an unsaturated acidic reagent copolymer, and a polyamine under reactive conditions. The alkenyl or alkyl substituent of the alkenyl or alkylsuccinic acid derivative has a Mn of from 1000 to 50 ...


8
Richard S Silver, Pamela M Bunting: Phosphate compound that is used in a microbial profile modification process. Chevron Research Company, Edward J Keeling, Ernest A Schaal, August 14, 1990: US04947932 (32 worldwide citation)

The present invention is a phosphate compound for use in a bacterial nutrient medium. The medium is injected downhole in a petroleum formation along with a bacteria (or its spore) and provides the bacteria with growth nutrients. The nutrient solution contains a phosphate compound which: will not pre ...


9
Waldeen C Buss: Composition and a method for its use in dehydrocyclization of alkanes. Chevron Research Company, S R LaPaglia, W K Turner, Ernest A Schaal, May 14, 1985: US04517306 (31 worldwide citation)

A new catalyst is disclosed which is useful for dehydrocyclizing alkanes. This catalyst contains a type L zeolite, a Group VIII metal, and an alkaline earth metal. This catalyst has been reduced in a hydrogen atmosphere at a temperature of from 480.degree. C. to 620.degree. C.


10
Thomas V Harris, R Norm Reynolds Jr, Roger F Vogel, Donald S Santilli: Process for reducing haze point in bright stock. Chevron U, Timothy J Hadlock, Ernest A Schaal, April 18, 2000: US06051129 (30 worldwide citation)

A dewaxing process for lowering the haze point of a bright stock which includes contacting a bright stock in the presence of added hydrogen gas with a Zeolite EU-1 catalyst in combination with a ZSM-48 and/or SSZ-32 catalyst.