Patents Represented by Attorney D. C. Kalasch

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  • Process of making hexagonal alpha metal-free phthalocyanine
    Patent number: 3932454
    Abstract: A process for the preparation of substantially hexagonal crystals of metal-free alpha phthalocyanine, said crystals ranging in size from about 1 micron to about 75 microns is disclosed. Photoelectrophoretic and manifold processes employing said crystals are also disclosed.
    Type: Grant
    Filed: August 7, 1973
    Date of Patent: January 13, 1976
    Assignee: Xerox Corporation
    Inventor: Ray H. Luebbe, Jr.