Granted Patent
Utility
US 4,990,259 · App. 07/412,417
Chromatographic separator sorbent bed preparation
Inventors:
Michael M. Kearney, Michael W. Mumm
Patented Case
View Patent ↗
Granted: Feb 5, 1991
Filed: Sep 26, 1989
Inventors
Michael M. Kearney
Michael W. Mumm
Assignee (at issue)
The Amalgamated Sugar Company, LLC.
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.