Granted Patent
Utility
US 5,641,722 · App. 08/306,489
High performance VPO catalyst and process of preparation thereof
Inventors:
Scott F. Mitchell, Robert A. Keppel, Michael J. Mummey
Patented Case
View Patent ↗
Granted: Jun 24, 1997
Filed: Sep 15, 1994
Inventors
Scott F. Mitchell
Robert A. Keppel
Michael J. Mummey
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.