Granted Patent
Utility
US 5,772,875 · App. 08/750,329
Chromatography column
Inventors:
Conny Pettersson, Ingrid Porrvik, Eva Eriksson
Patented Case
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Granted: Jun 30, 1998
Filed: Mar 4, 1997
Inventors
Conny Pettersson
Ingrid Porrvik
Eva Eriksson
Assignee (at issue)
Amersham Pharmacia Biotech, 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.