Granted Patent
Utility
US 5,439,593 · App. 08/158,179
Solid phase extraction apparatus
Inventor:
Thomas E. Price
Patented Case
View Patent ↗
Granted: Aug 8, 1995
Filed: Nov 23, 1993
Inventor
Thomas E. Price
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.