Patents by Inventor Lelio Alberto Gawantka Da Silva

Lelio Alberto Gawantka Da Silva 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).

  • Corrosion resistant sucker rods
    Patent number: 6737174
    Abstract: The present invention discloses a sucker rod with high resistance to corrosion, to be used preferably in oil wells. Said sucker rod comprises a core of carbon steel, whether alloyed or not, whose surface is coated by a copper base alloy. Said alloy comprises a 50 to 99.9% copper rate. A process for manufacturing said sucker rod is included.
    Type: Grant
    Filed: November 10, 1999
    Date of Patent: May 18, 2004
    Assignees: YPF S.A., Siderca S.A.I.C.
    Inventors: Gustavo Luis Bianchi, Lelio Alberto Gawantka Da Silva
  • Corrosion resistant sucker rods
    Patent number: 6723384
    Abstract: The present invention discloses a sucker rod with high resistance to corrosion, to be used preferably in oil wells. Said sucker rod comprises a core of carbon steel, whether alloyed or not, whose surface is coated by a copper base alloy. Said alloy comprises a 50 to 99.9% copper rate. A process for manufacturing said sucker rod is included.
    Type: Grant
    Filed: August 30, 2002
    Date of Patent: April 20, 2004
    Assignees: YPF S.A., Siderca S.A.I.C.
    Inventors: Gustavo Luis Bianchi, Lelio Alberto Gawantka Da Silva
  • Corrosion resistant sucker rods
    Publication number: 20030035895
    Abstract: The present invention discloses a sucker rod with high resistance to corrosion, to be used preferably in oil wells. Said sucker rod comprises a core of carbon steel, whether alloyed or not, whose surface is coated by a copper base alloy. Said alloy comprises a 50 to 99.9% copper rate. A process for manufacturing said sucker rod is included.
    Type: Application
    Filed: August 30, 2002
    Publication date: February 20, 2003
    Inventors: Gustavo Luis Bianchi, Lelio Alberto Gawantka Da Silva