Granted Patent
Utility
US 4,774,380 · App. 06/900,939
Alkali promoted manganese oxide compositions containing zirconium
Inventors:
C. Andrew Jones, John A. Sofranko
Patented Case
View Patent ↗
Granted: Sep 27, 1988
Filed: Aug 27, 1986
Inventors
C. Andrew Jones
John A. Sofranko
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.