Granted Patent
Utility
US 5,621,073 · App. 08/430,273
Chromatographic process for purification of insulin
Inventors:
Rainer Dickhardt, Bernhard Unger, Claudia Gr afe
Patented Case
View Patent ↗
Granted: Apr 15, 1997
Filed: Apr 28, 1995
Inventors
Rainer Dickhardt
Bernhard Unger
Claudia Gr afe
Assignee (at issue)
Hoechst GmbH
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.