1
James J Harrison, William R Ruhe Jr: Modified high molecular weight succinimides. Chevron Research and Technology Company a Division of Chevron U, E A Schaal, W K Turner, August 2, 1994: US05334321 (69 worldwide citation)

Alkenyl or alkyl succinimide additives which are the reaction product of a high molecular weight alkenyl- or alkyl-substituted succinic anhydride and a polyalkylene polyamine having an average of greater than 4 nitrogen atoms per mole, wherein the reaction product is post-treated with a cyclic carbo ...


2
Willard J Sevigny, Donald L Kuehne, Jeremy Cantor: Enhanced oil recovery method employing a high temperature brine tolerant foam-forming composition. Chevron Research and Technology Company a Division of Chevron U, E A Schaal, W K Turner, October 25, 1994: US05358045 (57 worldwide citation)

An enhanced oil recovery technique for recovering hydrocarbons from a reservoir during gas injection comprises the at least periodic injection of gas and a foam-forming composition into the reservoir. The foam-forming composition comprises water, an effective foam-forming amount of a C.sub.10-16 .al ...


3
James J Harrison, William R Ruhe Jr, Jack E Morris, Jacques Cazin: Chlorine-free lubricating oils having modified high molecular weight succinimides. Chevron Research and Technology Company A Division of Chevron U, W K Turner, E A Schaal, October 18, 1994: US05356552 (52 worldwide citation)

Alkenyl or alkyl succinimide additives which are the reaction product of a high molecular weight alkenyl- or alkyl-substituted succinic anhydride and a polyalkylene polyamine having an average of greater than 4 nitrogen atoms per mole, wherein the reaction product is post-treated with a cyclic carbo ...


4
K T Liu, William Rieken, J P Anduiza, G E Kouba: Method and apparatus for measuring multiphase flows. Chevron Research and Technology Company a Division of Chevron U, M W Carson, June 18, 1996: US05526684 (26 worldwide citation)

A self-regulating apparatus and method for measuring the components of a multiphase petroleum stream includes initially stratifying an incoming petroleum stream into substantially liquid and gas streams. The initial fluid stratification allows a flow-splitting separation to occur as the streams firs ...


5
Joseph L Goodrich: Polymer-modified asphalt composition and process for the preparation thereof. Chevron Research and Technology Company a division of Chevron U, J A Hagenah, J A Scholten, W K Turner, July 19, 1994: US05331028 (18 worldwide citation)

A polymer-modified asphalt composition containing (a) about 80 to 99.7 weight percent of a polymer-asphalt reaction product prepared by reacting (i) about 100 parts by weight of an asphalt having an initial viscosity at 60.degree. C. of from 100 to 20,000 poise, with (ii) about 0.5 to 11 parts by we ...


6
Nancy K Smrcka, Wesley A Middleton: Chlorine-free diesel engine lubricating composition. Chevron Research and Technology Company a Division of Chevron U, E A Schaal, W K Turner, December 6, 1994: US05370805 (15 worldwide citation)

A railway diesel engine lubricating composition is essentially free of zinc dithiophosphate wear inhibitors and chlorinated inhibitors. This composition has an oil of lubricating viscosity; a noncarbonated sulfurized calcium alkyl phenate, a carbonated sulfurized calcium alkyl phenate, a calcium Man ...


7
Stephen J Miller: Process for producing lube oil from solvent refined oils by isomerization over a silicoaluminophosphate catalyst. Chevron Research and Technology Company a Division of Chevron U, J A Scholten, V J Cavalieri, May 9, 1995: US05413695 (14 worldwide citation)

The invention provides for a process for producing lube oil having excellent viscosity and viscosity index properties and a low pour point from a solvent refined gas oil. The process comprises contacting a raffinate having a solvent dewaxed viscosity index of at least 90 and boiling above 350.degree ...


8
Yumi Nakagawa: Method for preparing crystalline materials using heterobridged aza-polycyclic templating agents. Chevron Research and Technology Company A Division of Chevron U, W K Turner, R J Sheridan, June 20, 1995: US05425933 (9 worldwide citation)

Molecular sieves, particularly zeolites, are prepared using heterobridged aza-polycyclic templates. The templates may be prepared in a series of reaction steps which include a Diels-Alder reaction between a diene and a dienophile.


9
Mohammad M Habib, Philip L Winslow, Richard O Moore Jr: Catalyst system for combined hydrotreating and hydrocracking and a process for upgrading hydrocarbonaceous feedstocks. Chevron Research and Technology Company A Division of Chevron U, V J Cavalieri, T J Hadlock, January 14, 1997: US05593570 (9 worldwide citation)

A physically intermixed catalyst system comprising two distinctly different catalytic particles, the first of which is a hydrodenitrification and/or hydrodesulfurization catalyst and the second of which is a relatively active hydrocracking catalyst, wherein the catalyst particles of both catalytic c ...


10
Mohammad M Habib, Philip L Winslow, Richard O Moore Jr: Catalyst system for combined hydrotreating and hydrocracking and a process for upgrading hydrocarbonaceous feedstocks. Chevron Research and Technology Company a Division of Chevron U, V J Cavalieri, August 8, 1995: US05439860 (6 worldwide citation)

A physically intermixed catalyst system comprising two distinctly different catalytic particles, the first of which is a hydrodenitrification and/or hydrodesulfurization catalyst and the second of which is a relatively active hydrocracking catalyst, wherein the catalyst particles of both catalytic c ...