Patents by Inventor Mark E. Gall

Mark E. Gall 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).

  • Black pearlescent pigments
    Patent number: 6616745
    Abstract: A metal oxide-coated mica pearlescent pigment having a coating of copper chromite thereon is provided.
    Type: Grant
    Filed: July 17, 2002
    Date of Patent: September 9, 2003
    Assignee: Engelhard Corporation
    Inventors: Samuel F. Narvarti, Mark E. Gall, Thomas V. Edwards, Frank A. Mazzella, William L. Howell, Jr.
  • Inorganic pigments of the empirical formula A.sub.x B.sub.y C.sub.z
    Patent number: 5080718
    Abstract: A pigment of irregular-shaped particles is described which comprises crystallites of the empirical formula A.sub.x B.sub.y C.sub.z wherein A and B are different; A is cobalt, nickel, copper, zinc, cadmium, iron, manganese or any combination thereof; B is aluminum, chromium, molybdenum, iron, vanadium, manganese or any combination thereof; C is oxygen, selenium, tellurium or sulfur; x is 1, 2 or 3; y is 2 or 3; and z is greater than 3; the crystallites have an average size of from about 75 to about 600 Angstroms; and the surface area of the pigment particles is greater than zero up to about 20 m.sup.2 /g. In one embodiment, when the pigment contains a mixture of copper oxide, iron oxide, manganese oxide and no chromium, the pigment contains no more than 10% of manganese, and when the pigment contains copper oxide, chromium oxide, and manganese oxide, the pigment contains up to about 5% of manganese oxide, the mole ratio of chromium to copper is no greater than about 1.3 to 1.
    Type: Grant
    Filed: February 23, 1989
    Date of Patent: January 14, 1992
    Assignee: Engelhard Corporation
    Inventors: Thomas J. Sullivan, Deepak S. Thakur, Brian D. Roberts, Mark E. Gall, Eugene Palka