Granted Patent
Utility
US 6,005,121 · App. 09/058,029
High productivity process for the production of maleic anhydride
Inventors:
Jerry R. Ebner, Robert A. Keppel, Michael J. Mummey
Patented Case
View Patent ↗
Granted: Dec 21, 1999
Filed: Apr 10, 1998
Inventors
Jerry R. Ebner
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.