Granted Patent
Utility
US 4,332,972 · App. 05/940,478
Modified zinc ferrite oxidative dehydrogenation catalysts in oxidative dehydrogenation
Inventors:
Harold F. Christmann, Edward J. Miklas
Patented Case
View Patent ↗
Granted: Jun 1, 1982
Filed: Sep 8, 1978
Inventors
Harold F. Christmann
Edward J. Miklas
Assignee (at issue)
Petro-Tex Chemical Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.