Granted Patent
Utility
US 4,598,306 · App. 06/518,184
Barrier layer for photovoltaic devices
Inventors:
Prem Nath, Masatsugu Izu
Patented Case
View Patent ↗
Granted: Jul 1, 1986
Filed: Jul 28, 1983
Inventors
Prem Nath
Masatsugu Izu
Assignee (at issue)
Energy Conversion Devices, Inc.
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.