Granted Patent
Utility
US 4,448,978 · App. 06/355,936
Process for preparing maleic anhydride
Inventors:
Ramon A. Mount, James T. Wrobleski
Patented Case
View Patent ↗
Granted: May 15, 1984
Filed: Mar 8, 1982
Inventors
Ramon A. Mount
James T. Wrobleski
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.