Patents by Inventor Edwin William Lehmann

Edwin William Lehmann 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).

  • Oil additives and compositions
    Patent number: 6458175
    Abstract: Compositions comprising a wax, a nucleator, and a wax growth arrestor improve the low temperature properties of fuel oils, especially high wax content fuels.
    Type: Grant
    Filed: December 2, 1998
    Date of Patent: October 1, 2002
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Edwin William Lehmann, Robert Dryden Tack
  • Chemical compositions and use as fuel additives
    Patent number: 5814110
    Abstract: Distillate fuel is treated with additives whose structure match the crystal planes of the wax which crystallizes from the fuel to produce crystals below 4000 nanometres in size, suitable additive include novel sulpho-carboxylic materials particularly their esters and amine derivatives such as the amine salts and/or amides of ortho-sulpho benzoic acid.
    Type: Grant
    Filed: November 23, 1994
    Date of Patent: September 29, 1998
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Kenneth William Bartz, Jacqueline Dawn Bland, David Paul Gillingham, Richard Dix Kerwood, Edwin William Lehmann, Kenneth Lewtas, John Edward Maddox, Albert Rossi, Robert Dryden Tack