Granted Patent
Utility
US 4,501,907 · App. 06/451,118
Maleic anhydride production using high butane feed concentration
Inventors:
Gerald K. Kwentus, Michael Suda
Patented Case
View Patent ↗
Granted: Feb 26, 1985
Filed: Dec 20, 1982
Inventors
Gerald K. Kwentus
Michael Suda
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.