Patents by Inventor D. John Durham

D. John Durham 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).

  • Boron containing overbased calixarates and lubricants and methods thereof
    Patent number: 6673751
    Abstract: A composition comprises a sulphur- and phosphorus-free, boron-containing overbased metal salt of a calixarene. The boron-containing overbased calixarene is useful in a lubricant additive composition, a lubricant composition, and a method to lubricate an internal combustion engine. The boron-containing overbased calixarene advantageously provides detergent and antiwear performance and does so without increasing the sulphur or phosphorus content of a lubricant additive or lubricant composition.
    Type: Grant
    Filed: November 6, 2002
    Date of Patent: January 6, 2004
    Assignee: The Lubrizol Corporation
    Inventors: David Cressey, David J. Moreton, D. John Durham