Patents by Inventor Andrew J. Markson

Andrew J. Markson 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).

  • Lubricant composition
    Patent number: 6048825
    Abstract: A lubricant composition suitable as a helicopter transmission lubricant comprises a synthetic base stock of viscosity in the range 5.0 to 10.0 cSt at 100.degree. C., an antioxidant component, a neutral organic phosphate component, a dicarboxylic acid component, a monocarboxylic acid component, a triazole component and a phosphorus containing extreme pressure additive.
    Type: Grant
    Filed: March 3, 1999
    Date of Patent: April 11, 2000
    Assignee: Castrol Limited
    Inventors: Andrew J. Markson, John W. A. Pragnell, Mark A. Edwards