Patents by Inventor Daniel G. P. Allais

Daniel G. P. Allais 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 preparation of lubricating base oils
    Patent number: 5470454
    Abstract: A process for the preparation of a lubricating base oil, comprising treating a hydrocarbonaceous product with hydrogen, at elevated temperature and pressure and in the presence of a catalyst, which hydrocarbonaceous product has been prepared by contacting hydrocarbons and/or derivatives thereof with an active hydrogen-containing system by a process which comprises generating a hydrogen-containing plasma and allowing contact of the hydrocarbons and/or derivatives thereof in liquid form with the plasma-generated system and recovering the hydrocarbonaceous product.
    Type: Grant
    Filed: June 2, 1993
    Date of Patent: November 28, 1995
    Assignee: Shell Oil Company
    Inventors: Pierre Grandvallet, Daniel G. P. Allais, Pierre E. J. G. Dejaifve
  • Process for the preparation of polar lubricating base oils
    Patent number: 5427703
    Abstract: Process for the preparation of a polar lubricating base oil, including reacting a hydrocarbonaceous product with a polar compound, including at least one heteroatom and which hydrocarbonaceous product has been prepared by contacting hydrocarbons and/or derivatives thereof with an active-hydrogen containing system by a process which includes generating a hydrogen-containing plasma and allowing contact of the hydrocarbons and/or derivatives thereof in liquid form with the plasma-generated system and recovering the hydrocarbonaceous product.
    Type: Grant
    Filed: June 2, 1993
    Date of Patent: June 27, 1995
    Assignee: Shell Oil Company
    Inventors: Pierre Grandvallet, Daniel G. P. Allais, Roland A. C. Garin