Patents by Inventor Robert W. Roberts

Robert W. Roberts 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).

  • Melt-spinning acrylonitrile polymer fiber using spinnerette of high orifice density
    Patent number: 4220616
    Abstract: Fusion melts of acrylonitrile polymer and water are effectively melt-spun through spinnerettes of high capillary density without sticking together of the individual filaments.
    Type: Grant
    Filed: August 30, 1978
    Date of Patent: September 2, 1980
    Assignee: American Cyanamid Company
    Inventors: Ronald E. Pfeiffer, Robert W. Roberts