Patents by Inventor Harold F. Christmann

Harold F. Christmann 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).

  • Modified zinc ferrite oxidative dehydrogenation catalysts in oxidative dehydrogenation
    Patent number: 4332972
    Abstract: Improved oxidative dehydrogenation catalysts are prepared by modifying a preformed zinc ferrite oxidative dehydrogenation catalyst with zinc oxide. The resulting catalyst compositions exhibit higher conversions and yields.
    Type: Grant
    Filed: September 8, 1978
    Date of Patent: June 1, 1982
    Assignee: Petro-Tex Chemical Corporation
    Inventors: Harold F. Christmann, Edward J. Miklas
  • Modified zinc ferrite oxidative dehydrogenation catalysts
    Patent number: 4020120
    Abstract: Improved oxidative dehydrogenation catalysts are prepared by modifying a zinc ferrite oxidative dehydrogenation catalyst with magnesium oxide. The resulting catalyst compositions exhibit higher conversions and yields.
    Type: Grant
    Filed: December 8, 1975
    Date of Patent: April 26, 1977
    Assignee: Petro-Tex Chemical Corporation
    Inventors: Harold F. Christmann, Edward J. Miklas
  • Modified zinc ferrite oxidative dehydrogenation catalysts
    Patent number: 3998760
    Abstract: Improved oxidative dehydrogenation catalysts are prepared by modifying a zinc ferrite oxidative dehydrogenation catalyst with magnesium oxide. The resulting catalyst compositions exhibit higher conversions and yields.
    Type: Grant
    Filed: September 3, 1974
    Date of Patent: December 21, 1976
    Assignee: Petro-Tex Chemical Corporation
    Inventors: Harold F. Christmann, Edward J. Miklas
  • Modified zinc ferrite oxidative dehydrogenation catalysts
    Patent number: 3960767
    Abstract: Improved oxidative dehydrogenation catalysts are prepared by modifying a preformed zinc ferrite oxidative dehydrogenation catalyst with zinc oxide. The resulting catalyst compositions exhibit higher conversions and yields.
    Type: Grant
    Filed: September 3, 1974
    Date of Patent: June 1, 1976
    Assignee: Petro-Tex Chemical Corporation
    Inventors: Harold F. Christmann, Edward J. Miklas