Patents by Inventor Eugenio Andre Campagnolo

Eugenio Andre Campagnolo 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).

  • Method and apparatus for determining the wax appearance temperature of paraffinic petroleum oils
    Patent number: 6035706
    Abstract: A method and apparatus for determining the wax appearance temperature of paraffinic petroleum oils which comprises measuring and plotting the density of the paraffinic oil as a function of temperature at constant pressure, with the wax appearance temperature being indicated by the inflection point of the graph.
    Type: Grant
    Filed: May 28, 1997
    Date of Patent: March 14, 2000
    Assignee: Petroleo Brasileiro S.A. - Petrobras
    Inventors: Eugenio Andre Campagnolo, Reinaldo Washington Ferreira Santos, Valter Antonio Monteiro Branco