Granted Patent
Utility
US 4,845,985 · App. 07/157,344
Supercritical fluid chromatography
Inventor:
Terry A. Berger
Patented Case
View Patent ↗
Granted: Jul 11, 1989
Filed: Feb 17, 1988
Inventor
Terry A. Berger
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.