Patents by Inventor Douglas W. Pressley

Douglas W. Pressley 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).

  • Method of determining cathodic corrosion and displaying
    Patent number: 4623434
    Abstract: The present invention relates to a method of representing corrosion occurring in the reinforced concrete structure and the resultant representation. The representation comprises a display of individual color indicia each representative of electrolytic voltage potential measured at a corresponding location on a surface of the structure. Each color indicia is one of a selected group of distinguishable color indicia and each distinguishable color indicia represents a predetermined range of electrolytic potentials. The method of representing corrosion involves measuring the electrolytic voltage potentials at predetermined locations on the concrete surface, and assigning a displacement co-ordinate to each measurement and a color indicia to each measured value of electrolytic voltage potential. The color indicia is representative of each measured electrolytic voltage potential and is marked on a surface in accordance with the co-ordinates of each measured potential.
    Type: Grant
    Filed: January 31, 1983
    Date of Patent: November 18, 1986
    Inventors: John P. Nicholson, Douglas W. Pressley