Patents by Inventor Stephen J. Gotheridge

Stephen J. Gotheridge 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: 10669501
    Abstract: The invention relates to industrial gear oil compositions that have been specially designed to have improved storage stability and/or paint compatibility and/or seal compatibility. This improvement is achieved while maintaining good performance in other areas. These improvements are particularly relevant to synthetic lubricants, such as those made with polyalphaolefin (PAO) base oils. This balance of properties has been difficult to achieve in synthetic compositions where problems in the areas of storage stability, paint compatibility and/or seal compatibility of become more pronounced. The invention also relates to processes of making such compositions and methods of using the same.
    Type: Grant
    Filed: June 8, 2015
    Date of Patent: June 2, 2020
    Assignee: The Lubrizol Corporation
    Inventors: David M. Hobson, Michael R. Kohut, Stephen J. Gotheridge
  • Publication number: 20140296119
    Abstract: The present invention relates to lubricating compositions and particularly gear oil compositions that include a minimum level of a specific antioxidant component, where the antioxidant component includes (i) a phenolic antioxidant, (ii) an aminic antioxidant, or (iii) a combination thereof, where the antioxidant component is present in the lubricating composition at from 1.0 percent by weight or higher. Such compositions provide surprisingly good seal compatibility.
    Type: Application
    Filed: October 25, 2012
    Publication date: October 2, 2014
    Applicant: The Lubrizol Corporation
    Inventor: Stephen J. Gotheridge