Patents by Inventor Frederico Irou Roschzttardtz

Frederico Irou Roschzttardtz 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).

  • Friction reducing copolymers and method of preparation thereof
    Patent number: 11845858
    Abstract: A friction reducer comprising a copolymer of acrylamide, an anionic monomer, a zwitterionic monomer or a cationic monomer, a physical ligand or a chemical ligand, wherein the acrylamide amounts to at least 50% (w/w) of the total monomer content. The friction reducer is useful in hydraulic fracturing operations and is obtained by controlled radical polymerization at a temperature between 30° C. and 70° C. using iodine as polymerization control agent.
    Type: Grant
    Filed: December 10, 2021
    Date of Patent: December 19, 2023
    Assignee: YPF TECNOLOGIA S.A.
    Inventors: Juan Martín Giussi, Lila Arias, Roque Carlos Dietrich, Isabel Vega, Sofía Rivelli, Juan Manuel Padró, Frederico Irou Roschzttardtz, Gabriel Lombardo, Paula Cecilia Dos Santos Claro
  • FRICTION REDUCING COPOLYMERS AND METHOD OF PREPARATION THEREOF
    Publication number: 20220186018
    Abstract: A friction reducer comprising a copolymer of acrylamide, an anionic monomer, a zwitterionic monomer or a cationic monomer, a physical ligand or a chemical ligand, wherein the acrylamide amounts to at least 50% (w/w) of the total monomer content. The friction reducer is useful in hydraulic fracturing operations and is obtained by controlled radical polymerization at a temperature between 30° C. and 70° C. using iodine as polymerization control agent.
    Type: Application
    Filed: December 10, 2021
    Publication date: June 16, 2022
    Inventors: Juan Martín GIUSSI, Lila ARIAS, Roque Carlos DIETRICH, Isabel VEGA, Sofía RIVELLI, Juan Manuel PADRÓ, Frederico Irou ROSCHZTTARDTZ, Gabriel LOMBARDO, Paula Cecilia DOS SANTOS CLARO
  • Structured Agrochemical Oil Based Systems
    Publication number: 20100190648
    Abstract: Structured agrochemical concentrates comprise agrochemical actives dispersed in a structured oil system of an oil and structurant oligomer including urethane and/or urea linkages and residues of a dimer or trimer component. The concentrate formulations may contain other components such as surfactants without the structurant loosing its effect a problem with known structurants. The concentrates can be readily diluted to give sprayable agrochemical formulations.
    Type: Application
    Filed: May 18, 2007
    Publication date: July 29, 2010
    Applicant: Croda International PLC
    Inventors: Peter James Tollington, Frederico Irou Roschzttardtz, Remco Benjamin van Triet, Eric Appelman, Hendrik Leendert Rieffe