Patents by Inventor Roger E. Gaynor

Roger E. Gaynor 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 hydroxygallium phthalocyanine
    Patent number: 5521306
    Abstract: A process for the preparation of Type V hydroxygallium phthalocyanine which comprises the in situ formation of an alkoxy-bridged gallium phthalocyanine dimer, hydrolyzing said alkoxy-bridged gallium phthalocyanine dimer to hydroxygallium phthalocyanine, and subsequently converting the hydroxygallium phthalocyanine product obtained to Type V hydroxygallium phthalocyanine.
    Type: Grant
    Filed: April 26, 1994
    Date of Patent: May 28, 1996
    Assignee: Xerox Corporation
    Inventors: Richard A. Burt, Cheng-Kuo Hsiao, Dasarao Murti, Roger E. Gaynor, Barkev Keoshkerian, James D. Mayo, George Liebermann
  • Metal phthalocyanines and processes for the preparation thereof
    Patent number: 5405954
    Abstract: Disclosed is a process for the preparation of chloroindium phthalocyanine which comprises heating a mixture of indium trichloride and ortho-phthalodinitrile in a mixture of solvents comprised of a dialkylaminoalkanol and a high boiling second solvent; and cooling the mixture to enable precipitation.
    Type: Grant
    Filed: June 18, 1993
    Date of Patent: April 11, 1995
    Assignee: Xerox Corporation
    Inventors: George Liebermann, Roger E. Gaynor, Ah-Mee Hor, Charles G. Allen