Patents by Inventor Roger L. A. Roofthooft

Roger L. A. Roofthooft 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).

  • Prestabilized chromium protective film to reduce radiation buildup
    Patent number: 5147597
    Abstract: The buildup of radioactive contaminants on the inside surface of light water reactor water systems is retarded by the use of a chromium coating of at least five hundred Angstroms on the surface exposed to the water system. The chromium coating is then passivated by exposure to an oxygen source for about five hours at a temperature between 150.degree. C. and 450.degree. C.
    Type: Grant
    Filed: April 9, 1991
    Date of Patent: September 15, 1992
    Assignee: Electric Power Research Institute
    Inventors: Roger L. A. Roofthooft, Roger H. Asay