Issued Patents 1997
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5639372 | Composite membranes for solid phase extractions and reactions | Donald F. Hagen, Paul E. Hansen | 1997-06-17 |
| 5635060 | Composite membranes for solid phase extractions and reactions | Donald F. Hagen, Paul E. Hansen | 1997-06-03 |
| 5618438 | Method of isolating an analyte using a solid phase extraction medium | James S. Fritz, Philip J. Dumont, Donald F. Hagen, Luther W. Schmidt | 1997-04-08 |
| 5616407 | Self-wettable solid phase extraction medium | James S. Fritz, Donald F. Hagen | 1997-04-01 |
| 5595649 | Particle-loaded nonwoven fibrous article for separations and purifications | Donald F. Hagen, Paul E. Hansen, Nicholas R. Baumann | 1997-01-21 |