Granted Patent
Utility
US 4,560,674 · App. 06/566,360
Catalysts for the production of maleic anhydride
Inventors:
James T. Wrobleski, James W. Edwards, Charles R. Graham, Robert A. Keppel, Harold Raffelson
Patented Case
View Patent ↗
Granted: Dec 24, 1985
Filed: Dec 28, 1983
Inventors
James T. Wrobleski
James W. Edwards
Charles R. Graham
Robert A. Keppel
Harold Raffelson
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.