Granted Patent
Utility
US 5,203,992 · App. 07/844,901
Apparatus for optimizing the liquid chromatographic separation of a sample
Inventor:
Antonius Drouen
Patented Case
View Patent ↗
Granted: Apr 20, 1993
Filed: Mar 2, 1992
Inventor
Antonius Drouen
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.