Patents by Inventor Colin S. Cundy

Colin S. Cundy 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).

  • Production of articles from minerals
    Patent number: 4608303
    Abstract: Vermiculite ore is contacted with an aqueous solution with at least one salt of sodium, lithium or an organosubstituted ammonium cation followed by aqueous washing so that the ore swells. The swollen vermiculite in aqueous suspension is subjected to a shearing action until a suspension containing vermiculite particles having dimensions less than 50 microns is produced with elimination from the suspension of all particles having a diameter larger than 50 microns. Water can then be removed from the suspension.
    Type: Grant
    Filed: June 9, 1982
    Date of Patent: August 26, 1986
    Assignee: Imperial Chemical Industries PLC
    Inventors: Denis G. H. Ballard, Colin S. Cundy, Graham R. Rideal, David C. W. Morley
  • Mineral products
    Patent number: 4219609
    Abstract: A process for the stabilization against water of a vermiculite article and the resultant product. The process consists essentially of contacting the article with the vapor of a nitrogen compound having the formula: ##STR1## where R1, R2 and R3 which may be the same or different are either hydrogen atoms or alkyl groups containing up to seven carbon atoms, provided that where R2 and R3 are both hydrogen atoms, R1 is an alkyl group containing less than three or more than six carbon atoms.
    Type: Grant
    Filed: March 24, 1978
    Date of Patent: August 26, 1980
    Inventor: Colin S. Cundy
  • Inorganic foam
    Patent number: 4130687
    Abstract: A rigid cellular foam of Vermiculite lamellae made by drying the frothy mass formed when an aqueous suspension is gasified.
    Type: Grant
    Filed: April 14, 1977
    Date of Patent: December 19, 1978
    Assignee: Imperial Chemical Industries Limited
    Inventors: Denis G. H. Ballard, Colin S. Cundy, Graham R. Rideal