Granted Patent
Utility
US 4,877,596 · App. 07/080,879
Process for the production of low carbon silicon
Inventors:
Ingo Schwirtlich, Peter Woditsch, Wolfgang Koch
Patented Case
View Patent ↗
Granted: Oct 31, 1989
Filed: Aug 3, 1987
Inventors
Ingo Schwirtlich
Peter Woditsch
Wolfgang Koch
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.