Patents by Inventor Hai-Yen T. Tran

Hai-Yen T. Tran 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).

  • Processes for the preparation of phthalocyanines
    Patent number: 5153313
    Abstract: A process for the preparation of phthalocyanine composites which comprises adding a metal free phthalocyanine, a metal phthalocyanine, a metalloxy phthalocyanine or mixtures thereof to a solution of trifluoroacetic acid and a monohaloalkane; adding to the resulting mixture a titanyl phthalocyanine; adding the resulting solution to a mixture that will enable precipitation of said composite, and recovering the phthalocyanine composite precipitated product.
    Type: Grant
    Filed: June 4, 1990
    Date of Patent: October 6, 1992
    Assignee: Xerox Corporation
    Inventors: Peter M. Kazmaier, Hai-Yen T. Tran, James M. Duff, James D. Mayo, Gordon K. Hamer, Terry L. Bluhm, Cheng K. Hsiao
  • Processes for the preparation of phthalocyanines imaging member
    Patent number: 5102758
    Abstract: A process for the preparation of phthalocyanine composites which comprises adding a metal free phthalocyanine, a metal phthalocyanine, a metalloxy phthalocyanine or mixtures thereof to a solution of trifluoroacetic acid and a monohaloalkane; adding to the resulting mixture a titanyl phthalocyanine; adding the resulting solution to a mixture that will enable precipitation of said composite, and recovering the phthalocyanine composite precipitated product.
    Type: Grant
    Filed: July 23, 1991
    Date of Patent: April 7, 1992
    Assignee: Xerox Corporation
    Inventors: Peter M. Kazmaier, Hai-Yen T. Tran, James M. Duff, James D. Mayo, Gordon K. Hamer, Terry L. Bluhm, Cheng K. Hsiao