Granted Patent
Utility
US 4,904,769 · App. 06/940,713
Highly pure acarbose
Inventor:
Erich Rauenbusch
Patented Case
View Patent ↗
Granted: Feb 27, 1990
Filed: Dec 11, 1986
Inventor
Erich Rauenbusch
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.