Patents by Inventor E. Wayne Andrews

E. Wayne Andrews 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).

  • Method of producing aggregated kaolinite pigment using organic silicon compounds
    Patent number: 5298066
    Abstract: An improved process for producing a aggregated kaolin pigment having desired physical and optical characteristics when used as a coating, filler or pigment in paper. The aggregated pigment is produced by contacting a substantially dry fine particle size kaolin with a previously hydrolyzed organic silicon compound, such as hydrolyzed tetraethoxysilane, and then recovering the aggregated kaolin pigment.
    Type: Grant
    Filed: February 22, 1993
    Date of Patent: March 29, 1994
    Assignee: ECC International Inc.
    Inventors: Dickey S. Shurling, Jr., Alan J. Brown, E. Wayne Andrews
  • Method of producing aggregated kaolinite pigment using organic silicon compounds
    Patent number: 5232495
    Abstract: An improved process for producing a aggregated kaolin pigment having desired physical and optical characteristics when used as a coating, filler or pigment in paper. The aggregated pigment is produced by mixing an aqueous slurry of a fine particle kaolin with a previously hydrolyzed organic silicon compound, such as hydrolyzed tetraethoxysilane, and then spray drying the mixture to form a dry, chemically aggregated kaolin pigment.
    Type: Grant
    Filed: May 1, 1992
    Date of Patent: August 3, 1993
    Assignee: ECC International Inc.
    Inventors: Dickey S. Shurling, Jr., Alan J. Brown, E. Wayne Andrews
  • Method for reducing the abrasion of calcined clay
    Patent number: 5022924
    Abstract: A method is provided for reducing the abrasiveness of calcined clay, e.g., kaolin clay. The method comprises intermixing the clay prior to calcination with a finely-divided silica, preferably in the form of colloidal or fumed silica, in an amount sufficient to reduce the abrasiveness of the calcined product.
    Type: Grant
    Filed: February 21, 1990
    Date of Patent: June 11, 1991
    Assignee: ECC America Inc.
    Inventors: Rasik H. Raythatha, Paul R. Suitch, E. Wayne Andrews
  • Structured kaolin pigments
    Patent number: 4826536
    Abstract: The invention relates to a structured kaolinitic pigment having improved physical and optical characteristics when incorporated as a filler or coating pigment in paper. The pigment consists of porous aggregates of kaolin particles which are chemically bonded together. The pigment may be produced by chemically reacting a particulate kaolin with a metal chloride, such as silicon tetrachloride, and with urea or an organic amine. The process is conducted under conditions such that the kaolinite structure is not altered.
    Type: Grant
    Filed: January 9, 1987
    Date of Patent: May 2, 1989
    Assignee: E.C.C America Inc.
    Inventors: Rasik H. Raythatha, E. Wayne Andrews
  • Kaolinite aggregation using sodium silicate
    Patent number: 4816074
    Abstract: A process is described in which a structured aggregated kaolin pigment is prepared by mixing substantially dry kaolin in particulate form with an aqueous alkali metal silicate to deposit on the surface of the kaolin particles a substantially molecular level of said silicate without formation of silica gel, drying the treated kaolin without calcination and exposing it to an acidic gas. The product is useful as a pigment in the coating or filling of paper.
    Type: Grant
    Filed: January 28, 1988
    Date of Patent: March 28, 1989
    Assignee: E.C.C. America Inc.
    Inventors: Rasik H. Raythatha, E. Wayne Andrews