Patents by Inventor Jean-Marie A. Bertaux

Jean-Marie A. Bertaux 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 manufacture of lubricating base oils
    Patent number: 5098551
    Abstract: Lubricating base oils having a high viscosity index, preferably at least 135, are manufactured by catalytic hydroisomerization of a hydrocarbonaceous feedstock, derived from a waxy crude oil, which feedstock has not been treated to remove a lubricating base oil fraction and which feedstock contains at least 30% by weight wax and has at least 80% by weight boiling above 300.degree. C. and at most 30% by weight boiling above 540.degree. C.
    Type: Grant
    Filed: May 16, 1990
    Date of Patent: March 24, 1992
    Inventors: Jean-Marie A. Bertaux, Jean-Claude M. Holley, Martinus M. P. Janssen