Patents by Inventor Paul R Stevenson

Paul R Stevenson 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).

  • Low molecular weight amide/ester containing quaternary ammonium salts
    Patent number: 11820957
    Abstract: The present technology is related to amide or ester containing quaternary ammonium salts having a hydrocarbyl substituent of number average molecular weight ranging from 300 to 750, and the use of such quaternary ammonium salts in fuel compositions to improve the water shedding performance of the fuel composition.
    Type: Grant
    Filed: March 25, 2021
    Date of Patent: November 21, 2023
    Assignee: THE LUBRIZOL CORPORATION
    Inventors: David J. Moreton, Paul R. Stevenson, Hannah Greenfield, David C. Arters, James H. Bush, Paul E. Adams
  • Low molecular weight imide containing quaternary ammonium salts
    Patent number: 11781085
    Abstract: The present technology is related to imide containing quaternary ammonium salts having a hydrocarbyl substituent of number average molecular weight ranging from 300 to 750, and the use of such quaternary ammonium salts in fuel compositions to improve the water shedding performance of the fuel composition.
    Type: Grant
    Filed: March 24, 2021
    Date of Patent: October 10, 2023
    Assignee: The Lubrizol Corporation
    Inventors: David C. Arters, David J. Moreton, James H. Bush, Paul R. Stevenson, Paul E. Adams
  • Ultra-low molecular weight imide containing quaternary ammonium salts having short hydrocarbon tails
    Patent number: 11254646
    Abstract: The present technology is related to imide containing quaternary ammonium salts having a hydrocarbyl substituent of number average molecular weight less 300, and additive packages having such quaternary ammonium salts and improved stability.
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: February 22, 2022
    Assignee: The Lubrizol Corporation
    Inventors: David C. Arters, David J. Moreton, James H. Bush, Paul R. Stevenson, Paul E. Adams
  • Diesel detergent without a low molecular weight penalty
    Patent number: 11174444
    Abstract: The composition of the present invention related to a quaternary ammonium salt detergent and the use of such quaternary ammonium salt detergents in a fuel composition to reduce diesel injector deposits and remove or clean up existing deposits on the diesel injectors.
    Type: Grant
    Filed: April 27, 2020
    Date of Patent: November 16, 2021
    Assignee: The Lubrizol Corporation
    Inventors: James H. Bush, Robert H. Barbour, David J. Moreton, Hannah Greenfield, Paul R. Stevenson, David C. Arters
  • Fuel additives
    Patent number: 11124720
    Abstract: Additive compositions comprising (a) a hydroxycarboxylic acid; and (b) a compound derived from a hydrocarbyl-substituted succinic acid or anhydride wherein the ratio of (a) to (b) in the additive composition ranges from 1:9 to 9:1. The additive compositions may be added to a fuel. Methods of reducing wear in an engine comprising operating the engine using a fuel composition have the additive composition therein. The use of an additive composition in a fuel composition to reduce the fuel composition's coefficient of friction or to reduce wear in an engine.
    Type: Grant
    Filed: March 5, 2018
    Date of Patent: September 21, 2021
    Assignee: The Lubrizol Corporation
    Inventors: Stuart L. Bartley, Paul R. Stevenson
  • LOW MOLECULAR WEIGHT AMIDE/ESTER CONTAINING QUATERNARY AMMONIUM SALTS
    Publication number: 20210214639
    Abstract: The present technology is related to amide or ester containing quaternary ammonium salts having a hydrocarbyl substituent of number average molecular weight ranging from 300 to 750, and the use of such quaternary ammonium salts in fuel compositions to improve the water shedding performance of the fuel composition.
    Type: Application
    Filed: March 25, 2021
    Publication date: July 15, 2021
    Inventors: David J. Moreton, Paul R. Stevenson, Hannah Greenfield, David C. Arters, James H. Bush, Paul E. Adams
  • LOW MOLECULAR WEIGHT IMIDE CONTAINING QUATERNARY AMMONIUM SALTS
    Publication number: 20210207051
    Abstract: The present technology is related to imide containing quaternary ammonium salts having a hydrocarbyl substituent of number average molecular weight ranging from 300 to 750, and the use of such quaternary ammonium salts in fuel compositions to improve the water shedding performance of the fuel composition.
    Type: Application
    Filed: March 24, 2021
    Publication date: July 8, 2021
    Inventors: David C. Arters, David J. Moreton, James H. Bush, Paul R. Stevenson, Paul E. Adams
  • Quaternary ammonium amide and/or ester salts
    Patent number: 10913910
    Abstract: The invention relates to quaternary ammonium amide and/or ester salts and their use as additives, including their use in fuels, such as diesel fuel. The invention particularly relates to the use of quaternary ammonium amide and/or ester salts as detergents in diesel fuels.
    Type: Grant
    Filed: October 14, 2019
    Date of Patent: February 9, 2021
    Assignee: The Lubrizol Corporation
    Inventors: Paul R. Stevenson, James C. Ray, David J. Moreton, James H. Bush
  • ULTRA-LOW MOLECULAR WEIGHT IMIDE CONTAINING QUATERNARY AMMONIUM SALTS HAVING SHORT HYDROCARBON TAILS
    Publication number: 20200361891
    Abstract: The present technology is related to imide containing quaternary ammonium salts having a hydrocarbyl substituent of number average molecular weight less 300, and additive packages having such quaternary ammonium salts and improved stability.
    Type: Application
    Filed: December 2, 2016
    Publication date: November 19, 2020
    Inventors: David C. Arters, David J. Moreton, James H. Bush, Paul R. Stevenson, Paul E. Adams
  • Diesel Detergent Without A Low Molecular Weight Penalty
    Publication number: 20200255760
    Abstract: The composition of the present invention related to a quaternary ammonium salt detergent and the use of such quaternary ammonium salt detergents in a fuel composition to reduce diesel injector deposits and remove or clean up existing deposits on the diesel injectors.
    Type: Application
    Filed: April 27, 2020
    Publication date: August 13, 2020
    Inventors: James H. Bush, Robert H. Barbour, David J. Moreton, Hannah Greenfield, Paul R. Stevenson, David C. Arters
  • Diesel detergent without a low molecular weight penalty
    Patent number: 10669496
    Abstract: The composition of the present invention related to a quaternary ammonium salt detergent and the use of such quaternary ammonium salt detergents in a fuel composition to reduce diesel injector deposits and remove or clean up existing deposits on the diesel injectors.
    Type: Grant
    Filed: December 18, 2018
    Date of Patent: June 2, 2020
    Assignee: The Lubrizol Corporation
    Inventors: James H. Bush, Robert H. Barbour, David J. Moreton, Hannah Greenfield, Paul R. Stevenson, David C. Arters
  • Quaternary Ammonium Amide And/Or Ester Salts
    Publication number: 20200040271
    Abstract: The invention relates to quaternary ammonium amide and/or ester salts and their use as additives, including their use in fuels, such as diesel fuel. The invention particularly relates to the use of quaternary ammonium amide and/or ester salts as detergents in diesel fuels.
    Type: Application
    Filed: October 14, 2019
    Publication date: February 6, 2020
    Inventors: Paul R. Stevenson, James C. Ray, David J. Moreton, James H. Bush
  • FUEL ADDITIVES
    Publication number: 20190382673
    Abstract: Additive compositions comprising (a) a hydroxycarboxylic acid; and (b) a compound derived from a hydrocarbyl-substituted succinic acid or anhydride wherein the ratio of (a) to (b) in the additive composition ranges from 1:9 to 9:1. The additive compositions may be added to a fuel. Methods of reducing wear in an engine comprising operating the engine using a fuel composition have the additive composition therein. The use of an additive composition in a fuel composition to reduce the fuel composition's coefficient of friction or to reduce wear in an engine.
    Type: Application
    Filed: March 5, 2018
    Publication date: December 19, 2019
    Inventors: Stuart L. Bartley, Paul R. Stevenson
  • Quaternary ammonium amide and/or ester salts
    Patent number: 10479950
    Abstract: The invention relates to quaternary ammonium amide and/or ester salts and their use as additives, including their use in fuels, such as diesel fuel. The invention particularly relates to the use of quaternary ammonium amide and/or ester salts as detergents in diesel fuels.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: November 19, 2019
    Assignee: The Lubrizol Corporation
    Inventors: Paul R. Stevenson, James C. Ray, David J. Moreton, James H. Bush
  • LOW MOLECULAR WEIGHT AMIDE/ESTER CONTAINING QUATERNARY AMMONIUM SALTS
    Publication number: 20190345406
    Abstract: The present technology is related to amide or ester containing quaternary ammonium salts having a hydrocarbyl substituent of number average molecular weight ranging from 300 to 750, and the use of such quaternary ammonium salts in fuel compositions to improve the water shedding performance of the fuel composition.
    Type: Application
    Filed: July 24, 2019
    Publication date: November 14, 2019
    Inventors: David J. Moreton, Paul R. Stevenson, Hannah Greenfield, David C. Arters, James H. Bush, Paul E. Adams
  • Diesel Detergent Without A Low Molecular Weight Penalty
    Publication number: 20190112539
    Abstract: The composition of the present invention related to a quaternary ammonium salt detergent and the use of such quaternary ammonium salt detergents in a fuel composition to reduce diesel injector deposits and remove or clean up existing deposits on the diesel injectors.
    Type: Application
    Filed: December 18, 2018
    Publication date: April 18, 2019
    Inventors: James H. Bush, Robert H. Barbour, David J. Moreton, Hannah Greenfield, Paul R. Stevenson, David C. Arters
  • Diesel detergent without a low molecular weight penalty
    Patent number: 10202559
    Abstract: The composition of the present invention related to a quaternary ammonium salt detergent and the use of such quaternary ammonium salt detergents in a fuel composition to reduce diesel injector deposits and remove or clean up existing deposits on the diesel injectors.
    Type: Grant
    Filed: October 22, 2013
    Date of Patent: February 12, 2019
    Assignee: THE LUBRIZOL CORPORATION
    Inventors: James H. Bush, Robert H. Barbour, David J. Moreton, Hannah Greenfield, Paul R. Stevenson, David C. Arters
  • Quaternary ammonium salt of a polyalkene-substituted amine compound
    Patent number: 10160850
    Abstract: A quaternary ammonium salt detergent made from the reaction product of the reaction of: (a) polyalkene-substituted amine having at least one tertiary amino group; and (b) a quaternizing agent suitable for converting the tertiary amino group to a quaternary nitrogen and the use of such quaternary ammonium salt detergents in a fuel composition to reduce intake valve deposits.
    Type: Grant
    Filed: November 19, 2014
    Date of Patent: December 25, 2018
    Assignee: The Lubrizol Corporation
    Inventors: David J. Moreton, Paul R. Stevenson, Dean Thetford, Jonathan S. Vilardo
  • ULTRA-LOW MOLECULAR WEIGHT AMIDE/ESTER CONTAINING QUATERNARY AMMONIUM SALTS HAVING SHORT HYDROCARBON TAILS
    Publication number: 20180355267
    Abstract: The present technology is related to amide or ester containing quaternary ammonium salts having a hydrocarbyl substituent of number average molecular weight less 300, and additive packages having such quaternary ammonium salts and improved stability.
    Type: Application
    Filed: December 2, 2016
    Publication date: December 13, 2018
    Inventors: David J. Moreton, Paul R. Stevenson, Hannah Greenfield, David C. Arters, James H. Bush, Paul E. Adams
  • Quaternary ammonium amide and/or ester salts
    Patent number: 10023819
    Abstract: The invention relates to quaternary ammonium amide and/or ester salts and their use as additives, including their use in fuels, such as diesel fuel. The invention particularly relates to the use of quaternary ammonium amide and/or ester salts as detergents in diesel fuels.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: July 17, 2018
    Assignee: The Lubrizol Corporation
    Inventors: Paul R. Stevenson, James C. Ray, David J. Moreton, James H. Bush