Granted Patent
Utility
US 5,529,694 · App. 08/332,942
Solid phase extraction apparatus and method of using same
Inventor:
Paul Strickler
Patented Case
View Patent ↗
Granted: Jun 25, 1996
Filed: May 2, 1995
Inventor
Paul Strickler
Assignee (at issue)
ENVIRONMENTAL EXPRESS, 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.