Granted Patent
Utility
US 4,412,940 · App. 06/217,731
Method for preparing maleic anhydride catalyst
Inventors:
Ramon A. Mount, Harold Raffelson
Patented Case
View Patent ↗
Granted: Nov 1, 1983
Filed: Dec 18, 1980
Inventors
Ramon A. Mount
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.