Granted Patent
Utility
US 4,251,452 · App. 06/016,081
Manganese (II) complexes
Inventors:
Charles A. McAuliffe, William Levason, Francis P. McCullough, Jr.
Patented Case
View Patent ↗
Granted: Feb 17, 1981
Filed: Feb 28, 1979
Inventors
Charles A. McAuliffe
William Levason
Francis P. McCullough, Jr.
Assignee (at issue)
NATIONAL RESEARCH DEVELOPMENT CORPORATION
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.