Patents by Inventor Peter W. Krag

Peter W. Krag 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 decreasing the level of impurities in zirconium chloride, titanium chloride and hafnium chloride
    Patent number: 5171549
    Abstract: An improved halogenator process and system is provided which significantly and economically decreases the level of impurities in the processing of various refractory metals and their halides and particularly hafnium tetrachloride which is condensed from gases produced by the chlorination of Zircon.
    Type: Grant
    Filed: May 22, 1991
    Date of Patent: December 15, 1992
    Assignee: Teledyne Wah Chang Albany
    Inventors: Ronald E. Walsh, Jr., Peter W. Krag, Roy E. Blackstone, Duane L. Hug