Patents by Inventor Clifford D. Marshall

Clifford D. Marshall 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).

  • Fusion product
    Patent number: 4634757
    Abstract: A process for reacting an acidic compound or anhydride with an epoxy-containing compound is disclosed. In a preferred embodiment this process comprises reacting a polyepoxide having more than one vic-epoxy group with a phenol in the presence of a methylene bis(triphenylphosphonium)halide catalyst.
    Type: Grant
    Filed: July 15, 1985
    Date of Patent: January 6, 1987
    Assignee: Shell Oil Company
    Inventor: Clifford D. Marshall
  • Process for reacting a phenol with an epoxy compound
    Patent number: 3978027
    Abstract: A process for reacting a phenol with an epoxy-containing compound is disclosed. This process comprises reacting a polyepoxide having more than one vic-epoxy group with a phenol in the presence of a potassium iodide catalyst. The products resulting from this process are also disclosed.
    Type: Grant
    Filed: May 7, 1975
    Date of Patent: August 31, 1976
    Assignee: Shell Oil Company
    Inventor: Clifford D. Marshall