Patents by Inventor Douglas Eugene Johnson

Douglas Eugene Johnson 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).

  • Method for maintaining antiwear performance of turbine oils containing polymerized amine antioxidants and for improving the deposit formation resistance performance of turbine oils containing monomeric and/or polymeric antioxidants
    Patent number: 8623795
    Abstract: The antiwear performance of turbine oils containing polymerized amine antioxidants and antiwear additives is maintained at or enhanced beyond the level as that of turbine oils containing monomeric amine antioxidants by employing as the antiwear additive a resorcinol bis(diphenylphosphate) (RDP). The deposit formation resistance performance of turbine oils containing monomeric and/or polymeric amine antioxidant is improved by employing RDP.
    Type: Grant
    Filed: July 26, 2011
    Date of Patent: January 7, 2014
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Michael R. Douglass, Douglas Eugene Johnson, Susan Ardito
  • Method for improving the deposit formation resistance performance of turbine oils containing amine antioxidants
    Patent number: 8618031
    Abstract: The deposit formation resistance performance of turbine oils containing amine antioxidants and antiwear additives is enhanced beyond the level of that of turbine oils containing tricresyl phosphate antiwear additive by employing as the antiwear additive a 4,4?-(Isopropylidenediphenyl)bis(diphenyl phosphate).
    Type: Grant
    Filed: July 26, 2011
    Date of Patent: December 31, 2013
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Michael R. Douglass, Douglas Eugene Johnson, Susan Ardito
  • Ladder Attachment
    Publication number: 20120175329
    Abstract: A ladder attachment having two trays connected by two supports. The connection of the two trays and two supports forms an internal hollow compartment. The two supports are attached to the two trays in a titled inwardly fashion, preferably forming an angle of 1-45°. Within this range, 15° is preferable because it corresponds to the pitch of a standard step ladder. The ladder attachment fits over the top of the step ladder whereby the internal compartment of the ladder attachment receives the step ladder.
    Type: Application
    Filed: January 7, 2011
    Publication date: July 12, 2012
    Inventor: Douglas Eugene Johnson
  • METHOD FOR MAINTAINING ANTIWEAR PERFORMANCE OF TURBINE OILS CONTAINING POLYMERIZED AMINE ANTIOXIDANTS AND FOR IMPROVING THE DEPOSIT FORMATION RESISTANCE PERFORMANCE OF TURBINE OILS CONTAINING MONOMERIC AND/OR POLYMERIC ANTIOXIDANTS
    Publication number: 20120142567
    Abstract: The antiwear performance of turbine oils containing polymerized amine antioxidants and antiwear additives is maintained at or enhanced beyond the level as that of turbine oils containing monomeric amine antioxidants by employing as the antiwear additive a resorcinol bis(diphenylphosphate) (RDP). The deposit formation resistance performance of turbine oils containing monomeric and/or polymeric amine antioxidant is improved by employing RDP.
    Type: Application
    Filed: July 26, 2011
    Publication date: June 7, 2012
    Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANY
    Inventors: Michael R. Douglass, Douglas Eugene Johnson, Susan Ardito
  • METHOD FOR IMPROVING THE DEPOSIT FORMATION RESISTANCE PERFORMANCE OF TURBINE OILS CONTAINING AMINE ANTIOXIDANTS
    Publication number: 20120028861
    Abstract: The deposit formation resistance performance of turbine oils containing amine antioxidants and antiwear additives is enhanced beyond the level of that of turbine oils containing tricresyl phosphate antiwear additive by employing as the antiwear additive a 4,4?-(Isopropylidenediphenyl)bis(diphenyl phosphate).
    Type: Application
    Filed: July 26, 2011
    Publication date: February 2, 2012
    Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANY
    Inventors: Michael R. Douglas, Douglas Eugene Johnson, Susan Ardito