Granted Patent
Utility
US 4,814,089 · App. 07/157,020
Chromatographic separation method and associated apparatus
Inventor:
M. Lalith Kumar
Patented Case
View Patent ↗
Granted: Mar 21, 1989
Filed: Feb 17, 1988
Inventor
M. Lalith Kumar
Assignee (at issue)
Suprex Corporation
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.