Patents by Inventor Timothy R. Erdman

Timothy R. Erdman 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).

  • Lubricating oil compositions containing a combination of a modified succinimide and a Group II metal overbased sulfurized alkylphenol
    Patent number: 4927551
    Abstract: Lubricating oil compositions containing a combination of a polyamino alkenyl or alkyl succinimide modified to contain carbamate functionalities and a Group II metal overbased sulfurized alkylphenol unexpectedly possess little, if any, adverse compatability effects on deposits in diesel engines as compared to lubricating oil compositions containing a combination of an unmodified polyamino alkenyl or alkyl succinimides and a Group II metal overbased sulfurized alkylphenol.
    Type: Grant
    Filed: April 14, 1989
    Date of Patent: May 22, 1990
    Assignee: Chevron Research Company
    Inventors: Timothy R. Erdman, Michael A. Shippey, Robert H. Wollenberg
  • Modified succinimides and lubricating oil compositions containing the same
    Patent number: 4840744
    Abstract: Disclosed are additives which are useful as dispersants in lubricating oils, gasolines, marine crankcase oils and hydraulic oils. In particular, disclosed are polyamino alkenyl or alkyl succinimides which contain carbamate functionalities.
    Type: Grant
    Filed: April 26, 1988
    Date of Patent: June 20, 1989
    Assignee: Chevron Research Company
    Inventors: Robert H. Wollenberg, Frank Plavac, Timothy R. Erdman
  • Hydrocarbon soluble nitrogen containing dispersant - fluorophosphoric acid adducts
    Patent number: 4747971
    Abstract: Amine-containing dispersants, such as succinimides, Mannich Bases and Viscosity-index improvers are reacted with fluorophosphoric acid. The reaction of the dispersant with the fluorophosphoric acid passivates the dispersant to fluorocarbon compositions used as seals, for example in automobile engines.
    Type: Grant
    Filed: March 6, 1987
    Date of Patent: May 31, 1988
    Assignee: Chevron Research Company
    Inventor: Timothy R. Erdman
  • Modified succinimides
    Patent number: 4746446
    Abstract: Disclosed are additives which are useful as dispersants in lubricating oils, gasolines, marine crankcase oils and hydraulic oils. In particular, disclosed are polyamino alkenyl or alkyl succinimides which contain carbamate functionalities.
    Type: Grant
    Filed: August 27, 1987
    Date of Patent: May 24, 1988
    Assignee: Chevron Research Company
    Inventors: Robert H. Wollenberg, Frank Plavac, Timothy R. Erdman
  • Modified carboxylic amide dispersants
    Patent number: 4713190
    Abstract: Carboxylic amide dispersants are reacted with a fluorine-containing acid reagent selected from fluorophosphoric acid, boron trifluoride, fluoboric acid and the ammonium salts thereof. The reaction of the dispersant with the fluorine-containing acid passivates the dispersant to fluorocarbon compositions used as seals, for example in automobile engines.
    Type: Grant
    Filed: October 23, 1985
    Date of Patent: December 15, 1987
    Assignee: Chevron Research Company
    Inventor: Timothy R. Erdman
  • Hydrocarbon soluble nitrogen containing dispersant - fluorophosphoric acid adducts
    Patent number: 4648980
    Abstract: Amine-containing dispersants, such as succinimides, Mannich Bases and Viscosity-index improvers are reacted with fluorophosphoric acid. The reaction of the dispersant with the fluorophosphoric acid passivates the dispersant to fluorocarbon compositions used as seals, for example in automobile engines.
    Type: Grant
    Filed: April 25, 1986
    Date of Patent: March 10, 1987
    Assignee: Chevron Research Company
    Inventor: Timothy R. Erdman
  • Hydrocarbon soluble nitrogen containing dispersant-fluorophosphoric acid adducts
    Patent number: 4615826
    Abstract: Amine-containing dispersants, such as succinimides, Mannich Bases and Viscosity-index improvers are reacted with fluorophosphoric acid. The reaction of the dispersant with the fluorophosphoric acid passivates the dispersant to fluorocarbon compositions used as seals, for example in automobile engines.
    Type: Grant
    Filed: June 17, 1985
    Date of Patent: October 7, 1986
    Assignee: Chevron Research Company
    Inventor: Timothy R. Erdman
  • Modified succinimides
    Patent number: 4612132
    Abstract: Disclosed are additives which are useful as dispersants in lubricating oils, gasolines, marine crankcase oils and hydraulic oils. In particular, disclosed are polyamino alkenyl or alkyl succinimides which contain carbamate functionalities.
    Type: Grant
    Filed: April 12, 1985
    Date of Patent: September 16, 1986
    Assignee: Chevron Research Company
    Inventors: Robert H. Wollenberg, Frank Plavac, Timothy R. Erdman
  • Fuel-efficient lubricating oil
    Patent number: 4584112
    Abstract: The fuel economy of an internal combustion engine can be improved by adding to the lubricating oil used to lubricate the crankcase of said engine from 0.25 to 2 weight percent of pentaerythritol mono-oleate in combination with 15 to 25 millimols per kilogram of zinc O,O-di(2-ethylhexyl)phosphorodithioate.
    Type: Grant
    Filed: June 19, 1985
    Date of Patent: April 22, 1986
    Assignee: Chevron Research Company
    Inventor: Timothy R. Erdman
  • Dispersant lubricating oil additives
    Patent number: 4548722
    Abstract: Dispersant lubricating oil additives are prepared by reacting oil-soluble dispersant compositions containing at least one primary or secondary amino group with SO.sub.2.
    Type: Grant
    Filed: November 9, 1984
    Date of Patent: October 22, 1985
    Assignee: Chevron Research Company
    Inventor: Timothy R. Erdman
  • Dispersant lubricating oil additives
    Patent number: 4521319
    Abstract: Dispersant lubricating oil additives are prepared by reacting oil-soluble dispersant compositions containing at least one primary or secondary amino group with SO.sub.2.
    Type: Grant
    Filed: August 2, 1983
    Date of Patent: June 4, 1985
    Assignee: Chevron Research Company
    Inventor: Timothy R. Erdman
  • Amine substituted hydrocarbon polymer dispersant lubricating oil additives
    Patent number: 4410437
    Abstract: Dispersant lubricating oil additives are prepared by reacting oil-soluble dispersant compositions containing at least one primary or secondary amino group with SO.sub.2.
    Type: Grant
    Filed: March 13, 1981
    Date of Patent: October 18, 1983
    Assignee: Chevron Research Company
    Inventor: Timothy R. Erdman
  • Method for improving fuel economy of internal combustion engines
    Patent number: 4406803
    Abstract: Lubricating oils containing oil soluble C.sub.10 -C.sub.30 alkane-1,2-diols have been found to reduce fuel consumption in an internal combustion engine.
    Type: Grant
    Filed: April 20, 1982
    Date of Patent: September 27, 1983
    Assignee: Chevron Research Company
    Inventors: Thomas V. Liston, Timothy R. Erdman
  • Fuel economy in internal combustion engines
    Patent number: 4376056
    Abstract: The fuel economy of an internal combustion engine can be improved by adding to the lubricating oil used to lubricate the crankcase of said engine from 0.25 to 2 weight percent of pentaerythritol mono-oleate.
    Type: Grant
    Filed: April 5, 1982
    Date of Patent: March 8, 1983
    Assignee: Chevron Research Company
    Inventor: Timothy R. Erdman
  • Fuel economy in internal combustion engines
    Patent number: 4336149
    Abstract: The fuel economy of an internal combustion engine can be improved by adding to the lubricating oil used to lubricate the crankcase of said engine from 0.25 to 2 weight percent of pentaerythritol mono-oleate.
    Type: Grant
    Filed: June 24, 1980
    Date of Patent: June 22, 1982
    Assignee: Chevron Research Company
    Inventor: Timothy R. Erdman
  • Method for reducing brake noise in oil-immersed disc brakes
    Patent number: 4331222
    Abstract: Lubricating oils containing oil soluble C.sub.8 -C.sub.28 alkane-1,2-diols have been found to reduce brake noise for oil-immersed disc brakes.
    Type: Grant
    Filed: July 7, 1980
    Date of Patent: May 25, 1982
    Assignee: Chevron Research Company
    Inventors: Thomas V. Liston, Timothy R. Erdman
  • Process of preparing dispersant lubricating oil additives
    Patent number: 4275006
    Abstract: Dispersant lubricating oil additives are prepared by reacting oil-soluble dispersant compositions containing at least one primary or secondary amino group with SO.sub.2.
    Type: Grant
    Filed: December 4, 1978
    Date of Patent: June 23, 1981
    Assignee: Chevron Research Company
    Inventor: Timothy R. Erdman