Patents by Inventor Peter E. Dufresne

Peter E. Dufresne 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 removing soluble and insoluble oxidation by-products from non-polar lubricating and hydraulic fluids
    Publication number: 20090001023
    Abstract: A method of inserting into a non-polar fluid flow a quantity of a solid medium having porosity, preferably a crosslinked polystyrene resin, which absorbs or adsorbs oil oxidation by-products or other lubricant degradation products or varnish precursors dramatically to extend the life and performance of the lubricating oil.
    Type: Application
    Filed: May 14, 2008
    Publication date: January 1, 2009
    Inventors: Peter E. Dufresne, Gregory J. Livingstone, David L. Wooton