Patents by Inventor Harold Isherwood

Harold Isherwood 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).

  • Metallization of substrates
    Patent number: 4943446
    Abstract: A method of metallizing a substrate by applying a metallic film to the substrate and measuring the film at a plurality of different lateral positions of the substrate by inducing an eddy current in the film and detecting the magnitude of the film to provide an indication of film thickness.
    Type: Grant
    Filed: September 11, 1984
    Date of Patent: July 24, 1990
    Assignee: Dennison Manufacturing Company
    Inventors: Harold Isherwood, Roy A. H. Iles
  • Starch
    Patent number: 4131574
    Abstract: A method for the manufacture of a starch solution in which, in the thermochemical conversion of starch using oxidizing agent and mechanical shear on the starch slurry at 110.degree. C to 180.degree. C, an amino-formaldehyde resin is added to the starch slurry before subjecting it to the mechanical shear.
    Type: Grant
    Filed: July 7, 1977
    Date of Patent: December 26, 1978
    Assignee: British Industrial Plastics Ltd.
    Inventors: Harold Isherwood, John T. Shaw