Granted Patent
Utility
US 5,264,200 · App. 07/915,129
Monolithic catalysts for conversion of sulfur dioxide to sulfur trioxide
Inventors:
Timothy R. Felthouse, Atis Vavere
Patented Case
View Patent ↗
Granted: Nov 23, 1993
Filed: Jul 14, 1992
Inventors
Timothy R. Felthouse
Atis Vavere
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.