Patents by Inventor Geoffrey Elliott Maud

Geoffrey Elliott Maud 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: 5785748
    Abstract: A method for the manufacture of a titanium dioxide pigment comprises mixing a suspension of titanium dioxide with a reagent formed by reacting concentrated phosphoric acid with aluminium or an aluminium compound at elevated temperature and adding an alkaline compound to the suspension until a pH value of at least 3.5 is achieved. A novel pigment which can be prepared by the method of the invention comprises titanium dioxide, the particles of which have a surface coating of aluminium phosphate in which the molar ratio of aluminium to phosphorus lies in the range 1.8:1 to 1:1.4 Al:P. The pigments prepared according to the invention are useful in the preparation of paper laminates.
    Type: Grant
    Filed: June 27, 1996
    Date of Patent: July 28, 1998
    Assignee: Tioxide Group Services Limited
    Inventors: Jonathan Banford, Geoffrey Elliott Maud, Maria Leonida Demosthenous