Patents by Inventor Robert P. Denault

Robert P. Denault 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).

  • Process for treatment of oxide films prior to chemical cleaning
    Patent number: 4476047
    Abstract: A process is described for oxidizing pretreatment of chromium (III) oxide containing films, resulting from corrosion of base metal surfaces of piping systems and the like, to render the corrosion films more amenable to conventional chemical cleaning treatments. The process uses a dilute aqueous solution of an iron (VI) salt (FeO.sub.4.sup.2-).
    Type: Grant
    Filed: March 22, 1982
    Date of Patent: October 9, 1984
    Assignee: London Nuclear Limited
    Inventors: Paul J. Bonnici, Robert P. Denault