Granted Patent
Utility
US 5,252,256 · App. 07/502,076
Passive protection of optically sensitive materials with transition metal organometallic cluster compounds
Inventors:
Lee W. Tutt, Stephen William McCahon
Patented Case
View Patent ↗
Granted: Oct 12, 1993
Filed: Mar 29, 1990
Inventors
Lee W. Tutt
Stephen William McCahon
Assignee (at issue)
Hughes Aircraft 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.