Granted Patent
Utility
US 5,945,368 · App. 08/538,005
Molybdenum-modified vanadium-phosphorus oxide catalysts for the production of maleic anhydride
Inventors:
Timothy R. Felthouse, Robert A. Keppel, Carl J. Schaefer
Patented Case
View Patent ↗
Granted: Aug 31, 1999
Filed: Oct 2, 1995
Inventors
Timothy R. Felthouse
Robert A. Keppel
Carl J. Schaefer
Assignee (at issue)
HUNTSMAN PETROCHEMICAL LLC
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.