Granted Patent
Utility
US 4,900,532 · App. 07/229,984
Continuous process for refining silicon
Inventors:
Gunter Kurz, Ingo Schwirtlich, Klaus Gebauer
Patented Case
View Patent ↗
Granted: Feb 13, 1990
Filed: Aug 9, 1988
Inventors
Gunter Kurz
Ingo Schwirtlich
Klaus Gebauer
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.