Patents by Inventor Curtis O. Hawkins

Curtis O. Hawkins 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).

  • Spinneret for the production of hollow filaments
    Patent number: 4229154
    Abstract: A spinneret for the production of hollow filaments that includes a cylindrical shaped insert swaged into each passage of the spinneret to effect a seal between the insert and spinneret. The insert is constructed to contain the polymer entirely within the insert to prevent leakage of polymer into the core gas supply passages of the spinneret.
    Type: Grant
    Filed: April 4, 1979
    Date of Patent: October 21, 1980
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Castulo Chaban, Jr., Curtis O. Hawkins