Patents by Inventor Cesar Liberato Petzhold

Cesar Liberato Petzhold 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).

  • Polystyrene and polylactic acid blends
    Patent number: 10030130
    Abstract: Polymeric blends of polystyrene (PS) and polylactic acid (PLA) are described, in the preparation of which a compatibilizing agent was added, preferably a PS-PLA block copolymer. Such compatibilizing agents act controlling phase separation of the blending compounds, and preventing excessive growth of polystyrene domains scattered in the PLA matrix; and this results in blends with good mechanical and thermal resistance.
    Type: Grant
    Filed: May 16, 2014
    Date of Patent: July 24, 2018
    Inventors: Vinicius Galhard Grassi, Augusto Cesar De Carvalho Peres, Marcus Fernando Dal Pizzol, Joao Manoel Da Costa, Andreia Ossig, Cesar Liberato Petzhold
  • Process for producing polymeric structures that have activated surfaces and activated polymeric structures
    Patent number: 9580838
    Abstract: The present invention relates to a process for producing polymeric structures that have activated surfaces. The process proved to be simple, quick, with high production capacity and low operating costs. The process occurs by depositing a polymer solution, which is assisted by a high electric field, on a conductive liquid surface to produce particles and/or filaments that have an activated surface. More particularly, the process of the present invention has the ability to produce particles and/or filaments that have chemically activated surfaces, in a single process.
    Type: Grant
    Filed: October 10, 2012
    Date of Patent: February 28, 2017
    Assignees: Fundacao Oswaldo Cruz, Universidade Federal do Parana-UFPR, Instituto de Biologia Molecular do Parana-IBMP, Universidade Federal do Rio Grande do Sul-UFRGS
    Inventors: Cyro Ketzer Saul, Elis Moura Stori, Cesar Liberato Petzhold, Wido H. Schreiner, Marco Aurelio Krieger, Leonardo Foti, Andre Sionek, Paula Poli Soares
  • POLYSTYRENE AND POLYLACTIC ACID BLENDS
    Publication number: 20160130430
    Abstract: Polymeric blends of polystyrene (PS) and polylactic acid (PLA) are described, in the preparation of which a compatibilizing agent was added, preferably a PS-PLA block copolymer. Such compatibilizing agents act controlling phase separation of the blending compounds, and preventing excessive growth of polystyrene domains scattered in the PLA matrix; and this results in blends with good mechanical and thermal resistance.
    Type: Application
    Filed: May 16, 2014
    Publication date: May 12, 2016
    Applicants: PETROLEO BRASILEIRO S.A. - PETROBRAS, Universidade Federal do Rio Grande do Sul - UFRGS
    Inventors: Vinicius GALHARD GRASSI, Augusto Cesar DE CARVALHO PERES, Marcus Fernando DAL PIZZOL, Joao Manoel DA COSTA, Andreia OSSIG, Cesar LIBERATO PETZHOLD
  • PROCESS FOR PRODUCING POLYMERIC STRUCTURES THAT HAVE ACTIVATED SURFACES AND ACTIVATED POLYMERIC STRUCTURES
    Publication number: 20140246812
    Abstract: The present invention relates to a process for producing polymeric structures that have activated surfaces. The process proved to be simple, quick, with high production capacity and low operating costs. The process occurs by depositing a polymer solution, which is assisted by a high electric field, on a conductive liquid surface to produce particles and/or filaments that have an activated surface. More particularly, the process of the present invention has the ability to produce particles and/or filaments that have chemically activated surfaces, in a single process.
    Type: Application
    Filed: October 10, 2012
    Publication date: September 4, 2014
    Applicants: Fundacao Oswaldo Cruz, Universidade Federal do Parana-UFPR, Instituto de Biologia Molecular do Parana-IBMP, Universidade Federal do Rio Grande do Sul-UFRGS
    Inventors: Cyro Ketzer Saul, Elis Moura Stori, Cesar Liberato Petzhold, Wido H. Schreiner, Marco Aurelio Krieger, Leonardo Foti, Andre Sionek, Paula Poli Soares