Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10269525 | Means of introducing an analyte into liquid sampling atmospheric pressure glow discharge | R. Kenneth Marcus, Charles Derrick Quarles, Jr., Richard E. Russo, David W. Koppenaal, Anthony J. Carado | 2019-04-23 |
| 9536725 | Means of introducing an analyte into liquid sampling atmospheric pressure glow discharge | R. Kenneth Marcus, Charles Derrick Quarles, Jr., Richard E. Russo, David W. Koppenaal, Anthony J. Carado | 2017-01-03 |
| 8648295 | Combined distance-of-flight and time-of-flight mass spectrometer | Christie G. Enke, Steven J. Ray, Alexander W. Graham, Gary M. Hieftje, David W. Koppenaal | 2014-02-11 |
| 8604423 | Method for enhancement of mass resolution over a limited mass range for time-of-flight spectrometry | Christie G. Enke, Steven J. Ray, Alexander W. Graham, Gary M. Hieftje, Elise Dennis +1 more | 2013-12-10 |
| 8362445 | UV-LED ionization source and process for low energy photoemission ionization | Luke C. Short, Robert G. Ewing | 2013-01-29 |
| 7498585 | Method and apparatus for simultaneous detection and measurement of charged particles at one or more levels of particle flux for analysis of same | M. Bonner Denton, Roger Sperline, David W. Koppenaal, Gary M. Hieftje, James H. Barnes +1 more | 2009-03-03 |
| 6259091 | Apparatus for reduction of selected ion intensities in confined ion beams | Gregory C. Eiden, David W. Koppenaal | 2001-07-10 |
| 5767512 | Method for reduction of selected ion intensities in confined ion beams | Gregory C. Eiden, David W. Koppenaal | 1998-06-16 |
| 5423964 | Combined electrophoresis-electrospray interface and method | Richard D. Smith, Harold R. Udseth | 1995-06-13 |