Granted Patent
Utility
US 6,040,521 · App. 08/854,092
N-type window layer for a thin film solar cell and method of making
Inventors:
Katsumi Kushiya, Daisuke Okumura, Ichiro Sugiyama
Patented Case
View Patent ↗
Granted: Mar 21, 2000
Filed: May 9, 1997
Inventors
Katsumi Kushiya
Daisuke Okumura
Ichiro Sugiyama
Assignee (at issue)
Showa Shell Sekiyu K.K.
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.