Patents by Inventor Pieter Jan Dirk Muntz

Pieter Jan Dirk Muntz 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).

  • Lubricating oil composition
    Patent number: 6156709
    Abstract: Lubricating oil compositions containing a medium molecular weight paraffin (MMWP) which is effective in improving the lubricant properties of an engine oil. The medium molecular weight paraffins disclosed include those having from between 10 to 20 carbon atoms. Compositions containing from 0.1% to 2% by volume of the engine oil are disclosed. The MMWP reduces varnishing, sludging, production of chemical byproducts and glazing. It also improves seal life and extends the life of lubricating oil compositions containing it.
    Type: Grant
    Filed: April 9, 1997
    Date of Patent: December 5, 2000
    Inventor: Pieter Jan Dirk Muntz
  • Lubricating oil composition
    Patent number: 6093861
    Abstract: The specification describes lubricating oil compositions containing an additive comprising normal paraffin and/or iso-paraffins and/or naphthenes each of which have from 10 to 20 carbon atoms. Compositions containing from 0.1 percent to 2 percent by volume are disclosed. The compositions are effective in reducing varnishing, sludging chemical by-products and glazing in an engine. The compositions are also useful in automatic transmissions fluid, gear oils and greases.
    Type: Grant
    Filed: February 27, 1997
    Date of Patent: July 25, 2000
    Inventor: Pieter Jan Dirk Muntz