Granted Patent
Utility
US 4,670,415 · App. 06/791,977
Process for the preparation of iron/lithium -promoted catalysts for the production of maleic anhydride
Inventors:
Robert A. Keppel, Victoria M. Franchetti
Patented Case
View Patent ↗
Granted: Jun 2, 1987
Filed: Oct 28, 1985
Inventors
Robert A. Keppel
Victoria M. Franchetti
Assignee (at issue)
Monsanto Company
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.