Patents by Inventor Derek W. Morecroft

Derek W. Morecroft 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).

  • Lubricating oil composition
    Patent number: 4462918
    Abstract: A lubricating oil composition is disclosed which comprises a major proportion of a lubricating oil and a minor proportion of each of a Group II metal dithiophosphate and composition having the formula ##STR1## wherein R.sup.1, R.sup.2, R.sup.5, R.sup.6 and R.sup.7 each are hydrogen or hydrocarbon containing 1-30 carbon atoms, and wherein R.sup.3 and R.sup.4 are independently selected from hydrogen, hydrocarbon containing from 1 to 30 carbon atoms, and acyl containing from 1 to 30 carbon atoms.
    Type: Grant
    Filed: February 8, 1983
    Date of Patent: July 31, 1984
    Assignee: Shell Oil Company
    Inventors: Peter H. D. Matthews, Derek W. Morecroft