Granted Patent
Utility
US 5,431,743 · App. 07/840,886
Silicon for solar cells, a process for the preparation thereof, and the use thereof
Inventor:
Ingo Schwirtlich
Patented Case
View Patent ↗
Granted: Jul 11, 1995
Filed: Feb 24, 1992
Inventor
Ingo Schwirtlich
Assignee (at issue)
Bayer Aktiengesellschaft
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.