Patents by Inventor Stephen Marrou

Stephen Marrou 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).

  • Methods of making acrylamide-acrylic acid copolymers
    Patent number: 10501625
    Abstract: A method of making acrylamide-acrylic acid copolymers in water-in-oil latices is described. The method results in a copolymer having randomly distributed carboxylate functionalities and is suitable for ionic crosslinking. The copolymers and their ionically crosslinked counterparts are useful for enhanced oil recovery processes.
    Type: Grant
    Filed: June 23, 2016
    Date of Patent: December 10, 2019
    Assignee: Ecolab USA Inc.
    Inventors: Stephen Marrou, Xiangyang Zhu, Heqing Huang
  • Highly random acrylamide-acrylic acid copolymers
    Patent number: 10472443
    Abstract: Highly random acrylamide-acrylic acid copolymers are described. Ionic crosslinking of the highly random copolymers in dilute solution results in improved viscosity and gel strength compared to copolymers prepared by conventional methods. The ionically crosslinked copolymers are useful in enhanced oil recovery processes.
    Type: Grant
    Filed: June 23, 2016
    Date of Patent: November 12, 2019
    Assignee: Ecolab USA Inc.
    Inventors: Stephen Marrou, Xiangyang Zhu, Heqing Huang
  • Methods of making acrylamide-acrylic acid copolymers
    Patent number: 10179855
    Abstract: A method of making acrylamide-acrylic acid copolymers in water-in-oil latices is described. The method results in a copolymer having randomly distributed carboxylate functionalities and is suitable for ionic crosslinking. The copolymers and their ionically crosslinked counterparts are useful for enhanced oil recovery processes.
    Type: Grant
    Filed: June 23, 2016
    Date of Patent: January 15, 2019
    Assignee: Ecolab USA Inc.
    Inventors: Stephen Marrou, Xiangyang Zhu, Heqing Huang
  • METHODS OF MAKING ACRYLAMIDE-ACRYLIC ACID COPOLYMERS
    Publication number: 20160376390
    Abstract: A method of making acrylamide-acrylic acid copolymers in water-in-oil latices is described. The method results in a copolymer having randomly distributed carboxylate functionalities and is suitable for ionic crosslinking. The copolymers and their ionically crosslinked counterparts are useful for enhanced oil recovery processes.
    Type: Application
    Filed: June 23, 2016
    Publication date: December 29, 2016
    Inventors: Stephen Marrou, Xiangyang Zhu, Heqing Huang
  • HIGHLY RANDOM ACRYLAMIDE-ACRYLIC ACID COPOLYMERS
    Publication number: 20160376389
    Abstract: Highly random acrylamide-acrylic acid copolymers are described. Ionic crosslinking of the highly random copolymers in dilute solution results in improved viscosity and gel strength compared to copolymers prepared by conventional methods. The ionically crosslinked copolymers are useful in enhanced oil recovery processes.
    Type: Application
    Filed: June 23, 2016
    Publication date: December 29, 2016
    Inventors: Stephen Marrou, Xiangyang Zhu, Heqing Huang