Patents by Inventor Francis Edward Jenkins

Francis Edward Jenkins 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).

  • Continuous process for preparing particulate microporous, open-celled polymer structures in a screw-type extruder
    Patent number: 4041115
    Abstract: A continuous process for preparing particulate microporous, open-celled polymer structures in a co-rotating twin-screw processor comprising agitating normally solid organic polymer and chlorofluorocarbon in the melt zone of said processor, cooling the resulting solution under agitation in the cooling and milling zone, extruding a snow-like mass from the cooling and milling zone, and then removing the chlorofluorocarbon from the snow-like mass to leave the polymer structures.
    Type: Grant
    Filed: May 12, 1975
    Date of Patent: August 9, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Francis Edward Jenkins, Daniel Gregory Tynan