Patents by Inventor Mario Roberto Rojas

Mario Roberto Rojas 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).

  • Fast dissolving, water soluble, hydrophobically-modified polyelectrolytes
    Patent number: 11332563
    Abstract: Copolymers and compositions containing copolymers having advantageous viscosity, friction reduction, dissolution, pH-stability, and temperature-stability are provided. These copolymers can be used as rheology modifiers for oil field applications.
    Type: Grant
    Filed: July 26, 2019
    Date of Patent: May 17, 2022
    Assignee: Ecolab USA Inc.
    Inventors: Paul Joseph Zinn, En-Wei Lin, Heinrich Enoch Bode, Mario Roberto Rojas, Christopher Steven Popeney, Pious Kurian
  • Drilling fluids and methods of use
    Patent number: 11124686
    Abstract: Drilling fluid compositions and methods of using them are described. The drilling fluid compositions comprise nanocomposites comprising core-shell morphology, wherein the core material comprises a nanoparticle having an average particle size of about 5 nm to 100 nm, and the shell material comprises a crosslinked polymer comprising acrylamide repeat units. The nanocomposites are effective fluid loss control agents when the drilling fluids are employed in mud drilling operations.
    Type: Grant
    Filed: June 9, 2016
    Date of Patent: September 21, 2021
    Assignee: ChampionX USA Inc.
    Inventors: Mario Roberto Rojas, Vittoria Balsamo de Hernandez
  • FAST DISSOLVING, WATER SOLUBLE, HYDROPHOBICALLY-MODIFIED POLYELECTROLYTES
    Publication number: 20200031968
    Abstract: Copolymers and compositions containing copolymers having advantageous viscosity, friction reduction, dissolution, pH-stability, and temperature-stability are provided. These copolymers can be used as rheology modifiers for oil field applications.
    Type: Application
    Filed: July 26, 2019
    Publication date: January 30, 2020
    Inventors: Paul Joseph Zinn, En-Wei Lin, Heinrich Enoch Bode, Mario Roberto Rojas, Christopher Steven Popeney, Pious Kurian
  • Methods for treating a well bore within an underground formation
    Patent number: 10000686
    Abstract: Methods of treating a well bore within an underground formation are disclosed. These methods include: (a) preparing a treatment composition by mixing a polyol-containing component and a polyisocyanate-containing component; and (b) introducing the treatment composition into the well bore. The polyol-containing component includes a polymeric polyol having a viscosity at 25° C. of no more than 1000 mPa·s and the isocyanate-containing component includes an unblocked (cyclo)aliphatic polyisocyanate polymer including allophanate groups and having a viscosity at 25° C. and at least 99% solids of no more than 1000 mPa·s.
    Type: Grant
    Filed: December 18, 2013
    Date of Patent: June 19, 2018
    Assignees: Covestro LLC, Ecolab USA Inc.
    Inventors: David P. Zielinski, Alan Ekin, Michael K. Jeffries, Mario Roberto Rojas
  • DRILLING FLUIDS AND METHODS OF USE
    Publication number: 20160362594
    Abstract: Drilling fluid compositions methods of using them are described. The drilling fluid compositions comprise nanocomposites comprising core-shell morphology, wherein the core material comprises a nanoparticle having an average particle size of about 5 nm to 100 nm, and the shell material comprises a crosslinked polymer comprising acrylamide repeat units. The nanocomposites are effective fluid loss control agents when the drilling fluids are employed in mud drilling operations.
    Type: Application
    Filed: June 9, 2016
    Publication date: December 15, 2016
    Inventors: Mario Roberto Rojas, Vittoria Balsamo de Hernandez