Granted Patent
Utility
US 4,576,766 · App. 06/530,160
Photochromic compounds and their use in photoreactive lenses
Inventors:
Martin W. Baskerville, William R. Maltman, Stephen N. Oliver
Patented Case
View Patent ↗
Granted: Mar 18, 1986
Filed: Sep 7, 1983
Inventors
Martin W. Baskerville
William R. Maltman
Stephen N. Oliver
Assignee (at issue)
The Plessey Company PLC
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.