Patents by Inventor Edgar Andreas Steigerwald

Edgar Andreas Steigerwald 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).

  • Patent number: 6521570
    Abstract: An automotive lubricant comprising a white oil basestock and one or more additives, at least one additive being an antioxidant. The white oil basestock may be blended with mineral oil and/or synthetic oil basestocks. The lubricant can be used, for example, as an engine oil, gear oil or automatic transmission fluid.
    Type: Grant
    Filed: January 26, 2000
    Date of Patent: February 18, 2003
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Marcel Alphonse Ostyn, Dominique Alves, Alain Gabriel Bouffet, Edgar Andreas Steigerwald
  • Publication number: 20030008783
    Abstract: An automotive lubricant comprising a white oil basestock and one or more additives, at least one additive being an antioxidant. The white oil basestock may be blended with mineral oil and/or synthetic oil basestocks. The lubricant can be used, for example, as an engine oil, gear oil or automatic transmission fluid.
    Type: Application
    Filed: January 26, 2000
    Publication date: January 9, 2003
    Inventors: Marcel Alphonse Ostyn, Dominique Alves, Alain Gabriel Bouffet, Edgar Andreas Steigerwald
  • Patent number: 6232279
    Abstract: Lubricant compositions suitable for use in automotive engines, especially internal combustion engines, the lubricant having a kinematic viscosity at 100° C. of less than 12.5 mm2/s and a high temperature, high shear dynamic viscosity (i.e. at a temperature of 150° C. and a shear rate of 106/s) of at least 2.9 mPa.s, and comprising (a) 70 to 99.5 wt. % of a base oil, preferably a mixture of poly-alpha-olefin and ester, having a kinematic viscosity at 100° C. of 2 to 8 mm2/s and a viscosity index of at least 120, and (b) 0.5 to 3 wt. % of an alkenylarene-conjugated diene copolymer, preferably styrene/butadiene copolymer, as a viscosity index improver. The lubricant provides an improvement in fuel economy performance whilst maintaining effective lubrication of the engine under operating conditions.
    Type: Grant
    Filed: June 25, 1999
    Date of Patent: May 15, 2001
    Assignee: Exxon Research and Engineering Company
    Inventor: Edgar Andreas Steigerwald