Patents by Inventor Christopher J. Bridge

Christopher J. Bridge 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).

  • Patent number: 4252565
    Abstract: A copper phthalocyanine derivative having the formula: ##STR1## or a mixture thereof wherein CuPc represents the residue of a copper phthalocyanine molecule, Y is an alkyl or alkenyl residue each having from 8 to 22 carbon atoms, and each being unsubstituted or substituted by one or more hydroxy groups or being interrupted by one or more nitrogen atoms, or Y is an alkoxyaryl- or aralkyloxyaryl, or an alkyl-aralkyloxyaryl residue wherein the alkoxy-, aralkyloxy- or alkyl-aralkyloxy moiety contains from 7 to 22 carbon atoms, and n is an integer from 1 to 8, provides, when incorporated into a phthalocyanine pigment, a phthalocyanine pigment composition having excellent flocculation resistance, when incorporated into paint and printing media, which moreover exhibit improved flow.
    Type: Grant
    Filed: November 5, 1979
    Date of Patent: February 24, 1981
    Assignee: Ciba-Geigy Corporation
    Inventors: Alexander M. Irvine, Robert Langley, Christopher J. Bridge