Patents by Inventor Franz R. Dykstra

Franz R. Dykstra 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).

  • Opacifying pigments and methods for making same
    Patent number: 4014709
    Abstract: Described are novel inexpensive opacifying pigments having a color ranging from tan to light dun and useful, for example, in the manufacture of paints and plastics. The pigments are composed of a mixture of a major weight proportion of particles of iron-bearing titania concentrated from a sedimentary kaolin clay ore and a minor proportion of particles of thermally dehydrated kaolin clay. Also described are methods for manufacturing such pigments from the waste product of clay beneficiation, preferably "Ultraflotation" beneficiation.
    Type: Grant
    Filed: June 8, 1976
    Date of Patent: March 29, 1977
    Assignee: Engelhard Minerals & Chemicals Corporation
    Inventors: Franz R. Dykstra, Aldo P. Allegrini, Miller B. Mallary, Tom A. Cecil