Patents by Inventor Ivan C. Cheetham

Ivan C. Cheetham 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: 4509559
    Abstract: A fire-barrier comprises a composite of three types of fire-retardant materials operable sequentially to combat an increase in temperature, e.g. as occurs on outbreak of a fire, by different methods. A preferred combination of materials is an outer layer of heat reflective material, an inner layer of thermally intumescent material and an intermediate layer of endothermal material between the inner and outer layers.
    Type: Grant
    Filed: March 22, 1983
    Date of Patent: April 9, 1985
    Assignee: Dunlop Limited
    Inventors: Ivan C. Cheetham, George A. Pope
  • Patent number: 4402346
    Abstract: A pipe for transporting crude oil comprises a layer of polymeric material for containing oil within the bore of the pipe, the polymeric material being surrounded and supported by a reinforcement structure comprising high tensile reinforcement elements which are protected from corrosion by gases passing from the polymeric layer through the reinforcement structure. The reinforcement element may be provided with a protective sheath, for example of low permeability material or a material which possesses electrolytic action, or the reinforcement element may be embedded in a matrix of high permeability material such that a preferential path is provided for the passage of gases through the reinforcement structure.
    Type: Grant
    Filed: September 7, 1982
    Date of Patent: September 6, 1983
    Assignee: Dunlop Limited
    Inventors: Ivan C. Cheetham, Jack M. Lowe, Glyn H. Redmond