Patents by Inventor Barrie D. James

Barrie D. James 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).

  • Production of phosphorothioate salts
    Patent number: 5210261
    Abstract: Amine salts of phosphorothioic acids, useful for example in lubricant compositions, are made by forming a mixture of sulphur and an amine, and then adding a phosphite ester. The reaction is controlled by the rate of addition of the ester.
    Type: Grant
    Filed: April 8, 1992
    Date of Patent: May 11, 1993
    Assignee: Ethyl Petroleum Additives, Ltd.
    Inventors: Barrie D. James, Roger Scattergood