Patents by Inventor Christopher James Dudding

Christopher James Dudding 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 producing zinc dialkyldithiophosphates exhibiting improved seal compatibility properties
    Patent number: 7592490
    Abstract: In general terms, the present invention includes a process for producing a new zinc dialkyldithiophosphate (ZDDP) offering improved seal compatibility characteristics in engine and transmission oil packages. The present invention additionally includes zinc dialkyldithiophosphate produced in accordance with the disclosed methodologies, and oil additives, lubricants, and engines and transmission comprising the zinc dialkyldithiophosphate of the present invention.
    Type: Grant
    Filed: October 2, 2007
    Date of Patent: September 22, 2009
    Assignee: Afton Chemical Corporation
    Inventors: Paul M. Thomson, Peter Growcott, Roger M. Sheets, Abbas Kadkhodayan, Christopher James Dudding
  • Process for producing zinc dialkyldithiophosphates exhibiting improved seal compatibility properties
    Patent number: 7368596
    Abstract: In general terms, the present invention includes a process for producing a new zinc dialkyldithiophosphate (ZDDP) offering improved seal compatibility characteristics in engine and transmission oil packages. The present invention additionally includes zinc dialkyldithiophosphate produced in accordance with the disclosed methodologies, and oil additives, lubricants, and engines and transmission comprising the zinc dialkyldithiophosphate of the present invention.
    Type: Grant
    Filed: November 6, 2003
    Date of Patent: May 6, 2008
    Assignee: Afton Chemical Corporation
    Inventors: Paul M. Thomson, Peter Growcott, Roger M. Sheets, Abbas Kadkhodayan, Christopher James Dudding