Granted Patent
Utility
US 4,386,215 · App. 06/325,157
Maleic anhydride production with high crush strength catalysts
Inventors:
Ramon A. Mount, Warn D. Robinson
Patented Case
View Patent ↗
Granted: May 31, 1983
Filed: Nov 27, 1981
Inventors
Ramon A. Mount
Warn D. Robinson
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.