Patents by Inventor Oswaldo d. Pereira, Jr.

Oswaldo d. Pereira, Jr. 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).

  • Process for the thermo-chemical cleaning of storage tanks
    Patent number: 5580391
    Abstract: A process for the thermo-chemical cleaning of storage tanks which contain sludges from petroleum oil or related products. The process is carried out by the combined action of an organic solvent and the generation of nitrogen gas and heat, whereby produced heating in situ, agitation by turbulence and flotation of the fluidized sludge, which after being collected and transferred to tanks or desalting units can be reintroduced in the usual refining flow.
    Type: Grant
    Filed: October 13, 1994
    Date of Patent: December 3, 1996
    Assignee: Petroleo Brasileiro S.A. - Petrobras
    Inventors: Zadson d. Franco, Carlos N. Khalil, Oswaldo d. Pereira, Jr.