Patents by Inventor Edmundo M. Marquez

Edmundo M. Marquez 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).

  • Article formed from a low carbon iron alloy having a corrosion resistant diffusion coating thereon
    Patent number: 5015535
    Abstract: The present invention relates to a ferrous article suitable for use in devices for burning heavy and extra heavy petroleum fuels and a process for forming such an article. The article has a matrix formed from a low carbon steel and a corrosion resistant chromium-aluminum diffusion coating on at least one surface. The coating is formed by subjecting the matrix to successive aluminization and chromization pack cementation treatments.
    Type: Grant
    Filed: May 9, 1990
    Date of Patent: May 14, 1991
    Assignee: Intevep, S.A.
    Inventors: Edmundo M. Marquez, Jean-Francois Nowak, Antonio Robles
  • Corrosion resistance of low carbon steels in a vanadium, sulfur and sodium environment at high temperatures
    Patent number: 4929473
    Abstract: The present invention relates to a ferrous article suitable for use in devices for burning heavy and extra heavy petroleum fuels and a process for forming such an article. The article has a matrix formed from a low carbon steel and a corrosion resistant chromium-aluminum diffusion coating on at least one surface. The coating is formed by subjecting the matrix to successive aluminization and chromization pack cementation treatments.
    Type: Grant
    Filed: May 8, 1989
    Date of Patent: May 29, 1990
    Assignee: Intevep, S. A.
    Inventors: Edmundo M. Marquez, Jean-Francois Nowak, Antonio Robles