Patents by Inventor Allen Frohardt

Allen Frohardt 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).

  • Means of enhancing the sensitivity of a gloss sensor
    Patent number: 4945253
    Abstract: A gloss sensor for optically measuring the gloss or reflectance of a surface. The gloss sensor includes a light source of emitting a light beam toward a surface to be measured. The gloss sensor also includes a light detecting device arranged to preferentially detect the intensity of the diffusely reflected component of the reflected light beam relative to the specularly reflected component.
    Type: Grant
    Filed: December 9, 1988
    Date of Patent: July 31, 1990
    Assignee: Measurex Corporation
    Inventor: Allen Frohardt
  • Gloss gauge
    Patent number: 4830504
    Abstract: A device for determining gloss on a surface having a calibrating feature wherein a gloss calibration standard is provided by means of a built-in standardization surface. The standardization surface provides a reference to which the gloss of a sample surface is compared. The standardization surface is protected from dust build-up throughout the operation of the device.
    Type: Grant
    Filed: June 24, 1987
    Date of Patent: May 16, 1989
    Assignee: Measurex Corporation
    Inventors: Allen Frohardt, John A. Dahlquist, John J. Howarth