Patents by Inventor Stephen B. Downing

Stephen B. Downing 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).

  • Painting device
    Patent number: 4257140
    Abstract: A conventional roller-type paint applicator, having a head surfaced with a paint-retentive material, is modified for use with a thickened paint to produce a textured pattern on a substrate by a sleeve which fits over the existing head. The sleeve, optionally in conjunction with the existing surface of the head, defines a plurality of receptacles for thickened paint which are arranged to determine a desired pattern of paint on a substrate.
    Type: Grant
    Filed: April 16, 1979
    Date of Patent: March 24, 1981
    Assignee: Imperial Chemical Industries Limited
    Inventor: Stephen B. Downing
  • Cementitious compositions
    Patent number: 4240840
    Abstract: Cementitious compositions having a modulus of rupture greater than 20 MN/m.sup.2 are prepared by subjecting a mixture of hydraulic cement, fine aggregate, a selected water-dispersible polymer and water to a homogenization process (in order to very substantially reduce voidage in the product) and by thereafter curing and drying the product. The aggregate improves the modulus of rupture and resists any loss in this strength property due to moisture uptake and loss.
    Type: Grant
    Filed: April 26, 1978
    Date of Patent: December 23, 1980
    Assignee: Imperial Chemical Industries Limited
    Inventors: Stephen B. Downing, Desmond W. J. Osmond, Maurice W. Skinner, Edmund J. West, David G. Dawson