Patents by Inventor Giacomo Barchietto

Giacomo Barchietto 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).

  • Polymerized vinyl carbazoles sensitized by nitro-substituted 9-dicyanomethylene fluorenes
    Patent number: 4069046
    Abstract: An electrophotographic plate is described comprising a charge-transfer complex of an aromatic resin and certain Lewis acids; typically 9-dicyanomethylene-2,4,7-trinitro-fluorene. Also described are methods of preparing and using this plate.
    Type: Grant
    Filed: January 29, 1974
    Date of Patent: January 17, 1978
    Assignee: Xerox Corporation
    Inventors: Helmut Hoegl, Giacomo Barchietto