Patents by Inventor Curtis B. Campbell

Curtis B. Campbell has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6269881
    Abstract: An oil recovery process is disclosed which uses a particular class of alkylaryl sulfonate surfactants. The surfactants are derived from an alpha-olefin stream having a broad distribution of even carbon numbers ranging from 12 to 58. The olefin stream is reacted with aromatic feedstock, such as benzene, toluene, xylene, or a mixture thereof to form alkylates, and then reacted with SO3 to form sulfonic acids. The resulting surfactant has high solubilization and ultra-low interfacial tension with crude oils, especially waxy crude oil, having a broad distribution of carbon numbers.
    Type: Grant
    Filed: December 17, 1999
    Date of Patent: August 7, 2001
    Assignees: Chevron U.S.A. Inc, Chevron Chemical Company LLC
    Inventors: Shang Chou, Curtis B. Campbell
  • Patent number: 5759966
    Abstract: Process for preparing high overbased metal sulfurized alkylphenates, wherein a majority of the alkalinity is provided by at least a stoichiometric excess of metal. The process is characterized by a sulfurization reaction using a promoter, followed by overbasing with carbon dioxide, a polyamine, and additional metal base in the presence of an alkylene glycol under reactive conditions at temperatures in the range of about from 150.degree. C. to 190.degree. C. The process affords a metal sulfurized phenate product which is substantially insensitive to overcarbonation, which exhibits low corrosive wear, and which exhibits high rates of acid neutralization. These compositions are useful in the formulation of marine cylinder lubricants.
    Type: Grant
    Filed: October 1, 1996
    Date of Patent: June 2, 1998
    Assignee: Chevron Chemical Company
    Inventor: Curtis B. Campbell
  • 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: 5330664
    Abstract: This invention is directed to neutral and low overbased alkylphenoxy sulfonates derived from alkylphenols prepared by alkylating phenol with an acidic alkylation catalyst having a Hammett (H.sub.o) acidity function of about -2.3 or less (more negative).
    Type: Grant
    Filed: September 2, 1992
    Date of Patent: July 19, 1994
    Assignee: Chevron Research and Technology Company
    Inventors: Robert H. Wollenberg, Richard J. Nelson, John McDonald, Susanne G. Ruelas, Curtis B. Campbell, Kathryn E. Matera
  • Patent number: 5330663
    Abstract: This invention is directed to neutral and low overbased alkylphenoxy sulfonates having a dialkyl content sufficient to provide an essentially neutral alkylphenoxy sulfonate having a viscosity no greater than about 1000 cSt at a temperature of 100.degree. C. in the presence of 40 weight percent diluent oil.
    Type: Grant
    Filed: September 2, 1992
    Date of Patent: July 19, 1994
    Assignee: Chevron Research and Technology Company
    Inventors: Robert H. Wollenberg, Richard J. Nelson, John McDonald, Susanne G. Ruelas, Curtis B. Campbell, Kathryn E. Matera
  • Patent number: 5320763
    Abstract: Disclosed are Group II metal overbased sulfurized alkylphenate compositions and in particular to Group II metal overbased sulfurized alkylphenate compositions derived from alkylphenols enriched in alkyl substituents attached to the phenol ring in an "end" position.
    Type: Grant
    Filed: March 12, 1993
    Date of Patent: June 14, 1994
    Assignee: Chevron Research and Technology Company
    Inventor: Curtis B. Campbell
  • Patent number: 5320762
    Abstract: Disclosed are Group II metal overbased sulfurized alkylphenate compositions and in particular to Group II metal overbased sulfurized alkylphenate compositions derived from alkylphenols enriched in alkyl substituents attached to the phenol ring in a "middle" position.
    Type: Grant
    Filed: March 12, 1993
    Date of Patent: June 14, 1994
    Assignee: Chevron Research and Technology Company
    Inventor: Curtis B. Campbell
  • Patent number: 5318710
    Abstract: Disclosed are Group II metal overbased sulfurized alkylphenate compositions and in particular to Group II metal overbased sulfurized alkylphenate compositions derived from alkylphenols enriched in alkyl substituents attached to the phenol ring in a "skewed" position.
    Type: Grant
    Filed: March 12, 1993
    Date of Patent: June 7, 1994
    Assignee: Chevron Research and Technology Company
    Inventor: Curtis B. Campbell
  • 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: 4877416
    Abstract: Disclosed is a synergistic fuel composition containing a hydrocarbyl-substituted amine or polyamine and a poly(oxyalkylene) monool. These compositions provide for an unexpected decrease in those deposits which have been correlated to Octane Requirement Increase (ORI).
    Type: Grant
    Filed: November 18, 1987
    Date of Patent: October 31, 1989
    Assignee: Chevron Research Company
    Inventor: Curtis B. Campbell
  • Patent number: 4696755
    Abstract: Lubricating oils containing an additive which contributes dispersancy and detergency to the lubricating oils are provided. The additives comprise hydroxy polyether amines of the general formula: ##STR1## The additive is present in the lubricating oil in a concentration of from about 0.01 to 10 percent by weight.
    Type: Grant
    Filed: December 28, 1984
    Date of Patent: September 29, 1987
    Assignee: Chevron Research Company
    Inventor: Curtis B. Campbell
  • Patent number: 4604103
    Abstract: Additives for internal combustion engines are provided which in fuels maintain cleanliness of intake system without contributing to combustion chamber deposits. The additives are hydrocarbylopoly(oxyalkylene) polyamine ethanes comprising a hydrocarbyl-terminated poly(oxyalkylene) chain of 2-5 carbon oxyalkylene units bonded to an ethane or branched ethane chain in turn bonded to a nitrogen atom of a polyamine having from 2 to 12 amine nitrogens and from 2 to 40 carbon atoms with a carbon:nitrogen ratio between 1:1 and 10:1.
    Type: Grant
    Filed: December 16, 1985
    Date of Patent: August 5, 1986
    Assignee: Chevron Research Company
    Inventor: Curtis B. Campbell
  • Patent number: 4600409
    Abstract: A fuel composition is disclosed containing 30 to 10,000 ppm of an additive comprising quaternized polyoxyalkylene amine salts of molecular weight 500 to about 2500, the polyoxyalkylene moiety comprising 1 to 30 oxyalkylene units, the units having 2 to 4 carbon atoms and the amine comprising 1 to 12 amine nitrogen atoms and 2 to 40 carbon atoms and having a connecting moiety linking the polyoxyalkylene moiety to the amine moiety. Also disclosed are lubricating oil compositions containing the additive, concentrates of this additive and the composition of the additive itself.
    Type: Grant
    Filed: October 25, 1985
    Date of Patent: July 15, 1986
    Assignee: Chevron Research Company
    Inventor: Curtis B. Campbell
  • Patent number: 4581151
    Abstract: A fuel composition is disclosed containing 30 to 10,000 ppm of an additive comprising quaternized polyoxyalkylene amine salts of molecular weight 500 to about 2500, the polyoxyalkylene moiety comprising 1 to 30 oxyalkylene units, the units having 2 to 4 carbon atoms and the amine comprising 1 to 12 amine nitrogen atoms and 2 to 40 carbon atoms and having a connecting moiety linking the polyoxyalkylene moiety to the amine moiety. Also disclosed are lubricating oil compositions containing the additive, concentrates of this additive and the composition of the additive itself.
    Type: Grant
    Filed: May 24, 1985
    Date of Patent: April 8, 1986
    Assignee: Chevron Research Company
    Inventor: Curtis B. Campbell
  • Patent number: 4564372
    Abstract: A fuel composition is disclosed containing 30 to 10,000 ppm of an additive comprising quaternized polyoxyalkylene amine salts of molecular weight 500 to about 2500, the polyoxyalkylene moiety comprising 1 to 30 oxyalkylene units, the units having 2 to 4 carbon atoms and the amine comprising 1 to 12 amine nitrogen atoms and 2 to 40 carbon atoms and having a connecting moiety linking the polyoxyalkylene moiety to the amine moiety. Also disclosed are lubricating oil compositions containing the additive, concentrates of this additive and the composition of the additive itself.
    Type: Grant
    Filed: July 20, 1984
    Date of Patent: January 14, 1986
    Assignee: Chevron Research Company
    Inventor: Curtis B. Campbell
  • Patent number: 4537693
    Abstract: Additives for lubricating oils for internal combustion engines which contribute dispersancy and detergency to the lubricating oils are disclosed. The additives are hydrocarbyl methylol poly(oxyalkylene) amino ethanes comprising a hydrocarbyl-terminated methylol poly(oxyalkylene) chain of 2 to 4 carbon oxyalkylene units bonded to an ethane or substituted ethane chain in turn bonded to a nitrogen atom of an amine or polyamine having from 1 to 12 amine nitrogens and from 2 to 40 carbon atoms.
    Type: Grant
    Filed: May 31, 1983
    Date of Patent: August 27, 1985
    Assignee: Chevron Research Company
    Inventor: Curtis B. Campbell
  • Patent number: 4527996
    Abstract: Additives for the control of deposits in the intake systems of engines are provided. The additives comprise hydroxy polyether amines of the general formula: ##STR1## Also provided are a fuel composition containing from about 250 ppm to 5000 ppm of this additive and a concentrate containing this additive.
    Type: Grant
    Filed: December 28, 1984
    Date of Patent: July 9, 1985
    Assignee: Chevron Research Company
    Inventor: Curtis B. Campbell
  • Patent number: 4526587
    Abstract: Additives for internal combustion engines are provided which in fuels maintain cleanliness of intake system without contributing to combustion chamber deposits. The additives are hydrocarbyl methylol poly(oxyalkylene) amino ethanes comprising a hydrocarbyl-terminated methylol poly(oxyalkylene) chain of 2 to 4 carbon oxyalkylene units bonded to an ethane or substituted ethane chain in turn bonded to a nitrogen atom of an amine or polyamine having from 1 to 12 amine nitrogens and from 2 to 40 carbon atoms.
    Type: Grant
    Filed: May 31, 1983
    Date of Patent: July 2, 1985
    Assignee: Chevron Research Company
    Inventor: Curtis B. Campbell
  • Patent number: 4438022
    Abstract: Additives for lubricating oils for internal combustion engines which contribute dispersancy and detergency to the lubricating oils are disclosed. The additives are hydrocarbylpoly(oxyalkylene) polyamine ethanes comprising a hydrocarbyl-terminated poly(oxyalkylene) chain of 2-5 carbon oxyalkylene units bonded to an ethane or substituted ethane chain in turn bonded to a nitrogen atom of a polyamine having from 2 to 12 amine nitrogens and from 2 to 40 carbon atoms with a carbon:nitrogen ratio between 1:1 and 10:1.
    Type: Grant
    Filed: July 30, 1982
    Date of Patent: March 20, 1984
    Assignee: Chevron Research Company
    Inventor: Curtis B. Campbell