Issued Patents All Time
Showing 26–41 of 41 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9170241 | Evacuable inlet for gas chromatograph injector | — | 2015-10-27 |
| 9092770 | Apparatus, system and method for stimulating and securing retail transactions | Tony Donofrio | 2015-07-28 |
| 8740587 | Apparatus and method for pumping in an ion optical device | — | 2014-06-03 |
| 8549893 | System and method for a gas chromatograph to mass spectrometer interface | — | 2013-10-08 |
| 8426805 | Method and apparatus for response and tune locking of a mass spectrometer | — | 2013-04-23 |
| 8371152 | Helium conservation device for a gas chromatograph | Paolo Magni | 2013-02-12 |
| 8308854 | Helium reclamation systems and methods for a gas chromatograph | Matt A. Lasater | 2012-11-13 |
| 8141411 | Method for determining a low cylinder pressure condition for a gas chromatograph | — | 2012-03-27 |
| 7791042 | Method and apparatus for selectively performing chemical ionization or electron ionization | Scott T. Quarmby | 2010-09-07 |
| 7759655 | Pulsed ion source for quadrupole mass spectrometer and method | — | 2010-07-20 |
| 7709790 | Removable ion source that does not require venting of the vacuum chamber | George B. Guckenberger, Joseph B. Wieck, Scott T. Quarmby | 2010-05-04 |
| 7622713 | Method and apparatus for normalizing performance of an electron source | Scott T. Quarmby, George B. Guckenberger | 2009-11-24 |
| 7507954 | Pulsed ion source for quadrupole mass spectrometer method | Scott T. Quarmby, George B. Guckenberger | 2009-03-24 |
| 7323682 | Pulsed ion source for quadrupole mass spectrometer and method | Scott T. Quarmby, George B. Guckenberger | 2008-01-29 |
| 6635885 | Apparatus for delivering calibration compounds to mass spectrometers and method | George B. Guckenberger | 2003-10-21 |
| 6593569 | Collisional gas delivery apparatus and method | — | 2003-07-15 |