Patents by Inventor Thomas A. Mc Gregor

Thomas A. Mc Gregor 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 improving low-temperature fluidity of lubricating oils using high-and-low-molecular weight polymer
    Patent number: 6458749
    Abstract: A method for improving the low temperature fluidity of lubricating oil compositions based on addition to lubricating oils of a mixture of selected high molecular weight and low molecular weight alkyl (meth)acrylate copolymers is disclosed. Combinations of low molecular weight alkyl (meth)acrylate polymers containing zero to 25 weight percent (C16-C24)alkyl (meth)acrylate with high molecular weight alkyl (meth)acrylate polymers containing 25 to 70 weight percent (C16-C24)alkyl (meth)acrylate are especially effective at satisfying different aspects of low temperature fluidity properties simultaneously for a broad range of base oils.
    Type: Grant
    Filed: July 9, 2001
    Date of Patent: October 1, 2002
    Assignee: Rohmax Additives GmbH
    Inventors: Bernard G. Kinker, Thomas A. Mc Gregor, Joan Marie Souchik