Patents by Inventor Howard E. Bellis

Howard E. Bellis 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).

  • Fluidized bed ring-opening polymerization process
    Patent number: 5288841
    Abstract: An improved process for the ring-opening polymerization of ring-opening polymerizable cyclic compounds using a fluidized bed.
    Type: Grant
    Filed: November 30, 1992
    Date of Patent: February 22, 1994
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Howard E. Bellis, Donald C. Paul