Patents by Inventor John D. Bien

John D. Bien 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).

  • Pigmenting fiber grade polyester
    Patent number: 4012358
    Abstract: Pigments are dispersed in fiber grade polyester by a two-step process:A. pigment and polyethylene are mixed at 50 to 75% pigment concentration under intensive mixing conditions, andB. the concentrate in (a) is reduced with fiber grade polyester under additional mixing conditions without substantial degradation of the polyester.
    Type: Grant
    Filed: April 11, 1975
    Date of Patent: March 15, 1977
    Assignee: Inmont Corporation
    Inventors: Cesar A. Cardenas, John D. Bien, Salvatore Carangelo