Granted Patent
Utility
US 4,247,419 · App. 06/102,818
Single phase vanadium(IV)bis(metaphosphate) oxidation catalyst with improved intrinsic surface area
Inventors:
James C. Vartuli, Lee R. Zehner
Patented Case
View Patent ↗
Granted: Jan 27, 1981
Filed: Dec 13, 1979
Inventors
James C. Vartuli
Lee R. Zehner
Assignee (at issue)
Atlantic Richfield 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.