Patents Represented by Attorney L. S. Squires
  • Patent number: 5620592
    Abstract: A catalyst, and method of preparing and using a catalyst, for the hydrodesulfurization of metal-containing heavy feedstocks, which has improved catalytic life and metals capacity. The catalyst contains Group VIB and Group VIII metals or metal compounds on a support comprising alumina wherein the support has 70 volume percent of its pore volume in pores having a diameter of between 140 and 220 .ANG..
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: April 15, 1997
    Assignee: Chevron U.S.A. Inc.
    Inventor: Richard S. Threlkel
  • Patent number: 5540893
    Abstract: A hydrocarbon feed pipe in a fluid catalytic cracking system includes a nozzle positioned in the upper section of the riser reactor pipe. This arrangement, together with one or more feed pipes at conventional locations in the riser reactor pipe, allows for feed segregation or feed splitting processes whereby different feed flow rates and/or compositions are fed to different points in the riser reactor pipe. Feed splitting/segregating processes provide for improved product yields and product properties.
    Type: Grant
    Filed: May 16, 1991
    Date of Patent: July 30, 1996
    Assignee: Chevron U.S.A. Inc.
    Inventor: Alan R. English
  • Patent number: 5434293
    Abstract: Disclosed is a method for alkylating alkyl salicylate using a solid acidic alkylation catalyst and approximately equimolar amounts of alkyl salicylate and alkylating feedstock.
    Type: Grant
    Filed: December 23, 1993
    Date of Patent: July 18, 1995
    Assignee: Chevron Chemical Company
    Inventor: Curtis B. Campbell
  • Patent number: 5415792
    Abstract: This invention is directed to overbased alkyl alkyl salicylate which are useful additives for lubricating oil compositions. In particular, the compositions of this invention impart detergency and disperancy to the lubricating oil composition as well as provide for alkalinity reserve.
    Type: Grant
    Filed: December 23, 1993
    Date of Patent: May 16, 1995
    Assignee: Chevron Chemical Company
    Inventor: Curtis B. Campbell
  • Patent number: 5399178
    Abstract: Mannich condensation products prepared by the condensation of a compound having the formula: ##STR1## wherein R is hydrogen, lower alkyl having 1 through 6 carbon atoms, hydroxy or lower alkoxy having 1 through 6 atoms; R.sup.1 is polyalkyl having an average molecular weight of about from 400 to 5000 and n is 0 or a whole integer of from 1 through 10 with ammonia, alkylamine, or polyamine and an aldehyde.The condensation products and their fuel-soluble salts are useful as fuel additives for the prevention and control of engine deposits.
    Type: Grant
    Filed: December 17, 1993
    Date of Patent: March 21, 1995
    Assignee: Chevron Chemical Company
    Inventor: Richard E. Cherpeck
  • Patent number: 5397486
    Abstract: Disclosed are lubricating oil compositions for use in 2-cycle railroad diesel engines having silver surfaced engine parts, which composition comprises an effective amount of a silver wear inhibiting compound. A method for inhibiting wear of silver-surfaced parts in railroad engines and a drive train of a two-cycle railroad diesel engine comprising silver wrist-pin bearings and the lubricating oil composition comprising the wear-inhibitor are also disclosed.
    Type: Grant
    Filed: July 30, 1993
    Date of Patent: March 14, 1995
    Assignee: Chevron Chemical Company
    Inventor: Vernon R. Small
  • Patent number: 5244591
    Abstract: Essentially chlorine-free lubricating compositions having a TBN of 10-30 designed for use in internal combustion engines having silver bearing parts which provide protection for said bearings via the incorporation therein of certain unsaturated aliphatic carboxylic acids. An additive concentrate for said lubricating compositions is also disclosed.
    Type: Grant
    Filed: March 23, 1992
    Date of Patent: September 14, 1993
    Assignee: Chevron Research and Technology Company
    Inventor: Wesley A. Middleton
  • Patent number: 5232616
    Abstract: Provided are lubricating oil compositions which contain (a) a mixture comprising an oil-soluble alkali metal compound and certain polyalkenyl succinimide or (b) alkali metal salts of said polyalkenyl succinimides.
    Type: Grant
    Filed: August 21, 1990
    Date of Patent: August 3, 1993
    Assignee: Chevron Research and Technology Company
    Inventors: James J. Harrison, Curtis B. Campbell
  • Patent number: 5180415
    Abstract: A method for providing preemergent weed control in large seeded crops and certain medium and small seeded crops. The method comprises the preemergent application of certain 5-alkylamino-3-oxo-2-optionally substituted phenyl-4-(3-trifluoromethylphenyl)-4,5-dihydrofurans to control weeds in such crops.
    Type: Grant
    Filed: October 23, 1989
    Date of Patent: January 19, 1993
    Assignee: Chevron Chemical Company
    Inventor: Ahmad Omid
  • Patent number: 5091377
    Abstract: Trisubstituted silyalkyl 1,2,4-triazole and imidazole phenyl borane compounds having the formula: ##STR1## wherein n, X, R, R.sup.1, R.sup.2, R.sup.3, R.sup.4, and R.sup.5 are defined in the description, and processes and intermediates for the preparation thereof are disclosed.The compounds of Formula I are especially useful as agricultural fungicides.
    Type: Grant
    Filed: December 14, 1990
    Date of Patent: February 25, 1992
    Assignee: Chevron Research and Technology Company
    Inventors: Tsze H. Tsang, Vincent J. Spadafora
  • Patent number: 5075292
    Abstract: Organodiborane alkanes having the formula: ##STR1## wherein R, R.sup.1, R.sup.2, R.sup.3, Z and Z' are defined in the description, and intermediates therefor are disclosed.The compounds of formula I are especially useful as agricultural fungicides.
    Type: Grant
    Filed: April 12, 1990
    Date of Patent: December 24, 1991
    Assignee: Chevron Research and Technology Company
    Inventors: Tsze H. Tsang, Jon L. Strutzel
  • Patent number: 5051514
    Abstract: Organoborane imidazole compounds having the formula: ##STR1## wherein R, R.sup.1, R.sup.2, R.sup.3, R.sup.4, and X are defined in the description, and intermediates therefor are disclosed.The compounds of formula I are especially useful as agricultural fungicides.
    Type: Grant
    Filed: September 25, 1990
    Date of Patent: September 24, 1991
    Assignee: Chevron Research and Technology Company
    Inventors: Tsze H. Tsang, Patricia Pomidor
  • Patent number: 4983589
    Abstract: Organoborane Imidazole compounds having the formula: ##STR1## wherein R, R.sup.1, R.sup.2, R.sup.3, R.sup.4, and X are defined in the description, and intermediates therefor are disclosed.The compounds of formula I are especially useful as agricultural fungicides.
    Type: Grant
    Filed: December 14, 1989
    Date of Patent: January 8, 1991
    Assignee: Chevron Research and Technology Company
    Inventors: Tsze H. Tsang, Vincent J. Spadafora, Patricia Pomidor
  • Patent number: 4983590
    Abstract: Organoborane triazoles compounds having the formula: ##STR1## wherein R, R.sup.1 and R.sup.2 are defined in the description, and intermediates therefor are disclosed.The compounds of formula I are especially useful as agricultural fungicides.
    Type: Grant
    Filed: March 12, 1990
    Date of Patent: January 8, 1991
    Assignee: Chevron Research and Technology Company
    Inventors: Tsze H. Tsang, Jon L. Strutzel
  • Patent number: 4978386
    Abstract: 2-(3-substituted phenyl)-3-amino-2-cyclopentenone derivatives. The compounds generally exhibit both pre-emergence and post-emergence phytotoxicity and are useful as herbicides and also at low dosages as plant growth regulating agents.
    Type: Grant
    Filed: October 31, 1985
    Date of Patent: December 18, 1990
    Assignee: Chevron Research Company
    Inventor: Carl E. Ward
  • Patent number: 4966988
    Abstract: A method is provided for forming (3-trifluoromethylphenyl)acetonitrile through the intermediate .alpha.,.alpha.,.alpha.-trifluoro-.alpha.'-chloro-m-xylene. This intermediate is formed by selective chlorination of .alpha.,.alpha.,.alpha.'-trichloro-m-xylene under conditions which maximize yield and minimize the formation of undesired, non-recyclable chlorinated by-products.
    Type: Grant
    Filed: February 17, 1989
    Date of Patent: October 30, 1990
    Assignee: Chevron Research Company
    Inventors: William L. Schinski, Peter Denisevich, Jr.
  • Patent number: 4959491
    Abstract: A two-step dimerization process for producing semi-linear C.sub.12 olefins using homogeneous dimerization catalysts and new C.sub.12 olefins mixtures. The C.sub.12 product is especially useful for the production of biodegradable sulfonated alkylaryl detergents and intermediates therefor.
    Type: Grant
    Filed: March 11, 1987
    Date of Patent: September 25, 1990
    Assignee: Chevron Research Company
    Inventor: Richard S. Threlkel
  • Patent number: 4885027
    Abstract: Arylmethylenesulfonamidoacetamide and thioacetamide derivatives and arylmethylenesulfonamidoester intermediates therefor. The compounds are useful as selective herbicides especially with respect to the prevention and elimination of barnyardgrass in grass crops, especially in rice crops.
    Type: Grant
    Filed: November 14, 1986
    Date of Patent: December 5, 1989
    Assignee: Chevron Research Company
    Inventor: Patricia B. Pomidor
  • Patent number: 4846873
    Abstract: Compounds of the formula: ##STR1## wherein R.sup.1 is lower alkyl of 1 to 6 carbon atoms lower alkenyl of 2 to 6 carbon atoms or benzyl; R.sup.2 is lower alkoxy of 1 to 6 carbon atoms, benzyloxy or the group ##STR2## where R.sup.4 is lower alkoxy of 1 to 4 carbon atoms; and R.sup.3 is hydrogen, lower alkyl of 1 to 6 carbon atoms, lower alkyl of 1 to 6 carbon atoms substituted with 1 to 3 trihalomethyl groups, lower haloalkyl of 1 to 6 carbon atoms substituted with 1 to 6 halogen atoms, lower alkenyl of 2 to 6 carbon atoms, arylalkyl of 7 to 12 carbon atoms, lower alkoxyalkyl of 2 to 6 carbon atoms, lower alkylthioalkyl of 2 to 6 carbon atoms, or lower cycloalkyl of 3 to 8 carbon atoms are active as plant growth regulators. Certain of these compounds also show activity as selective herbicides.
    Type: Grant
    Filed: May 22, 1987
    Date of Patent: July 11, 1989
    Assignee: Chevron Research Company
    Inventors: Jeffrey A. Hagenah, Ahmad Omid
  • Patent number: 4831179
    Abstract: Arylmethylenesulfonamidoacetonitrile derivatives. The compounds are useful as selective hericides especially with respect to the prevention and elimination of barnyardgrass in grass crops, especially rice.
    Type: Grant
    Filed: November 14, 1986
    Date of Patent: May 16, 1989
    Assignee: Chevron Research Company
    Inventor: Patricia B. Pomidor