Granted Patent
Utility
US 5,981,868 · App. 08/841,690
Thin-film solar cell comprising thin-film light absorbing layer of chalcopyrite multi-element compound semiconductor
Inventors:
Katsumi Kushiya, Muneyori Tachiyuki, Takahisa Kase
Patented Case
View Patent ↗
Granted: Nov 9, 1999
Filed: Apr 30, 1997
Inventors
Katsumi Kushiya
Muneyori Tachiyuki
Takahisa Kase
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.