Patents by Inventor John A. Bradbury

John A. Bradbury 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).

  • Network of bonded expanded polystyrene beads having chemically delaminated vermiculite impregnant
    Patent number: 4447491
    Abstract: A fire-resistant material comprising a network of bonded expanded polystyrene beads having an organic or inorganic impregnant material incorporated in the interstices in the network so as to provide a reticulated impregnant structure which is retained upon destruction of the network of bonded expanded polystyrene beads, for example in a fire, and the structure retained upon removal of the polystyrene. The preferred impregnant material is a layer mineral, especially chemically delaminated vermiculite.
    Type: Grant
    Filed: May 11, 1982
    Date of Patent: May 8, 1984
    Assignee: Imperial Chemical Industries Plc
    Inventors: John A. Bradbury, Reuben Rowlands, James W. Tipping
  • Inorganic foam
    Patent number: 4395456
    Abstract: A rigid inorganic foam of cellular structure comprising one or more layer minerals, and a method for making inorganic foams comprising gasifying a suspension of one or more layer minerals in a liquid medium, shaping the gasified suspension, and removing the liquid medium from the shaped gasified suspension.
    Type: Grant
    Filed: January 5, 1981
    Date of Patent: July 26, 1983
    Assignee: Imperial Chemical Industries Limited
    Inventors: Graham V. Jackson, Terence Goulding, John A. A. Bradbury