Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5618438 | Method of isolating an analyte using a solid phase extraction medium | Philip J. Dumont, Donald F. Hagen, Craig G. Markell, Luther W. Schmidt | 1997-04-08 |
| 5616407 | Self-wettable solid phase extraction medium | Donald F. Hagen, Craig G. Markell | 1997-04-01 |
| 5230806 | Modified resins for solid-phase extraction | Jeffrey J. Sun | 1993-07-27 |
| 5071565 | Modified resins for solid-phase extraction | Jeffrey J. Sun | 1991-12-10 |
| 4970170 | Liquid chromatographic determination of water | Nancy E. Fortier | 1990-11-13 |
| 4944878 | Decontamination of water using nitrate selective ion exchange resin | James E. Lockridge | 1990-07-31 |
| 4272246 | Method and apparatus for chromatographic quantitative analysis | Douglas T. Gjerde, Gabriella Schmuckler | 1981-06-09 |