Patents by Inventor Henry Leidheiser, Jr.

Henry Leidheiser, Jr. 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).

  • Structural crack monitoring technique
    Patent number: 5534289
    Abstract: A method is disclosed for monitoring a structure for the formation of cracks and for providing protection of the structure from the environment, including the following steps: applying to the structure a first coating comprising microcapsules of a first color, applying over the first coating, a second coating having a second color, and identifying cracked portions which form in the structure by observing changes in the color of the second coating resulting from eruption of microcapsules in the first coating.
    Type: Grant
    Filed: January 3, 1995
    Date of Patent: July 9, 1996
    Assignee: Competitive Technologies Inc.
    Inventors: Wayne H. Bilder, Richard D. Granata, Henry Leidheiser, Jr.
  • Environmental corrosion monitor system incorporating deposited contaminants and corrosion products
    Patent number: 5045775
    Abstract: A system for monitoring and measuring the corrosion reaction of metals in an environment. The system includes a sample corrosion element of substantially the same material as the structure to be monitored, a galvanic cell for generating an electric signal indicative of the corrosion on the corrosion element, and a monitor for receiving and storing the generated signal. Moreover, the system is designed to incorporate corrosion products and environmental contaminants in order to simulate actual, localized conditions on a particular area of a structure.
    Type: Grant
    Filed: October 31, 1989
    Date of Patent: September 3, 1991
    Assignee: Lehigh University
    Inventors: Malcolm L. White, Henry Leidheiser, Jr.
  • Corrosion inhibited metal
    Patent number: 4681814
    Abstract: A metal surface is passivated, or rendered resistant to corrosion, by a dense, intimately adherent overlayer of an insoluble, non-reactive compound comprised of an organic compound complexed with the surface layer of metal of the underlying substrate. The overlayer is formed by first forming a thin oxide layer on the substrate, such as by anodization, and then treating the substrate by anodically depositing and concurrently reacting the complex-forming organic compound. Preferably, the substrate is steel, the anodization and treating baths are borate solutions, and the organic compound is 8-hydroxyquinoline.
    Type: Grant
    Filed: August 29, 1985
    Date of Patent: July 21, 1987
    Assignee: Lehigh University
    Inventors: Henry Leidheiser, Jr., Hidetaka Konno
  • Method of making corrosion inhibited metal
    Patent number: 4563253
    Abstract: A metal surface is passivated, or rendered resistant to corrosion, by a dense, intimately adherent overlayer of an insoluble, non-reactive compound comprised of an organic compound complexed with the surface layer of metal of the underlying substrate. The overlayer is formed by first forming a thin oxide layer on the substrate, such as by anodization, and then treating the substrate by anodically depositing and concurrently reacting the complex-forming organic compound. Preferably, the substrate is steel, the anodization and treating baths are borate solutions, and the organic compound is 8-hydroxyquinoline.
    Type: Grant
    Filed: November 7, 1983
    Date of Patent: January 7, 1986
    Assignee: Lehigh University
    Inventors: Henry Leidheiser, Jr., Hidetaka Konno