Granted Patent
Utility
US 5,651,886 · App. 08/641,085
Separation column for chromatography
Inventors:
Bernd Hoffmann, Guenter Schaeufele
Patented Case
View Patent ↗
Granted: Jul 29, 1997
Filed: Apr 29, 1996
Inventors
Bernd Hoffmann
Guenter Schaeufele
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.