Granted Patent
Utility
US 5,213,683 · App. 07/742,592
Apparatus for charging and discharging of chromatography column bed
Inventor:
William H. Mann
Patented Case
View Patent ↗
Granted: May 25, 1993
Filed: Aug 8, 1991
Inventor
William H. Mann
Assignee (at issue)
Chromaflow, Inc.
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.