Patents by Inventor Robert Carl Steves

Robert Carl Steves 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).

  • Method of producing hydroxyalkylcarbamate-functional polyamides and uses thereof
    Patent number: 11292953
    Abstract: A modified drilling fluid comprising a drilling fluid and the reaction product(s) of a polyalkylene polyamine, fatty acid, and alkylene carbonate, and methods of making and using the same.
    Type: Grant
    Filed: April 24, 2018
    Date of Patent: April 5, 2022
    Assignee: HUNTSMAN Petrochemical LLC
    Inventors: Robert Carl Steves, John H. Clements, David C. Lewis
  • Water-in-oil hydraulic fracturing fluid and method of using such
    Patent number: 11008503
    Abstract: A hydraulic fracturing fluid comprising a water-in-oil emulsion comprising (i) an aqueous solution, (ii) an oil, (iii) a first surfactant, and, optionally, (iv) at least one secondary surfactant selected from an emulsifying surfactant and/or a phosphate ester of ethoxylated alcohol or alkylphenol, and methods of making and using the same.
    Type: Grant
    Filed: April 24, 2018
    Date of Patent: May 18, 2021
    Assignee: INDORAMA VENTURES OXIDES LLC
    Inventors: Robert Carl Steves, John H. Clements, David C. Lewis
  • METHOD OF PRODUCING HYDROXYALKYLCARBAMATE-FUNCTIONAL POLYAMIDES AND USES THEREOF
    Publication number: 20200115615
    Abstract: A modified drilling fluid comprising a drilling fluid and the reaction product(s) of a polyalkylene polyamine, fatty acid, and alkylene carbonate, and methods of making and using the same
    Type: Application
    Filed: April 24, 2018
    Publication date: April 16, 2020
    Inventors: Robert Carl Steves, John H. Clements, David C. Lewis
  • NOVEL WATER-IN-OIL HYDRAULIC FRACTURING FLUID AND METHOD OF USING SUCH
    Publication number: 20200115623
    Abstract: A hydraulic fracturing fluid comprising a water-in-oil emulsion comprising (i) an aqueous solution, (ii) an oil, (iii) a first surfactant, and, optionally, (iv) at least one secondary surfactant selected from an emulsifying surfactant and/or a phosphate ester of ethoxylated alcohol or alkylphenol, and methods of making and using the same.
    Type: Application
    Filed: April 24, 2018
    Publication date: April 16, 2020
    Inventors: Robert Carl Steves, John H. Clements, David C. Lewis