James L. Bertsch
36Patents
14h-index
35Co-inventors
81Inventor score
Filing activity: Jul 11, 1994 → Jul 7, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5750988A | Orthogonal ion sampling for APCI mass spectrometry | Physics | 153 | Expired |
| US6653626B2 | Ion sampling for APPI mass spectrometry | Electricity | 85 | Expired |
| US6359275B1 | Dielectric conduit with end electrodes | Electricity | 76 | Expired |
| US5838003A | Ionization chamber and mass spectrometry system containing an asymmetric electrode | Electricity | 75 | Expired |
| US5736741A | Ionization chamber and mass spectrometry system containing an easily removable and replaceable capillary | Electricity | 74 | Expired |
| US5495108A | Orthogonal ion sampling for electrospray LC/MS | Electricity | 68 | Expired |
| US5753910A | Angled chamber seal for atmospheric pressure ionization mass spectrometry | Physics | 50 | Expired |
| US6646257B1 | Multimode ionization source | Electricity | 34 | Expired |
| US6032876A | Apparatus for forming liquid droplets having a mechanically fixed inner microtube | Physics | 30 | Expired |
| US5726447A | Ionization chamber and mass spectrometer having a corona needle which is externally removable from a closed ionization chamber | Electricity | 23 | Expired |
| US7064322B2 | Mass spectrometer multipole device | Electricity | 17 | Expired |
| US6294779A | Orthogonal ion sampling for APCI mass spectrometry | Electricity | 17 | Expired |
| USRE36892E | Orthogonal ion sampling for electrospray .[.LC/MS.]. mass spectrometry | General | 17 | Expired |
| US7078681B2 | Multimode ionization source | Electricity | 16 | Expired |
| US8039795B2 | Ion sources for improved ionization | Electricity | 13 | Active |
| US7488953B2 | Multimode ionization source | Electricity | 10 | Active |
| US8890086B1 | Ion detector response equalization for enhanced dynamic range | Electricity | 7 | Active |
| US6849846B2 | Precision multiple electrode ion mirror | Emerging Cross-Sectional Technologies | 6 | Expired |
| US8193489B2 | Converging multipole ion guide for ion beam shaping | Electricity | 6 | Active |
| US7423262B2 | Precision segmented ion trap | Electricity | 6 | Active |
| US6278110A | Orthogonal ion sampling for APCI mass spectrometry | Physics | 6 | Expired |
| US6797946B2 | Orthogonal ion sampling for APCI mass spectrometry | Electricity | 5 | Expired |
| US6639216B2 | Orthogonal ion sampling for APCI mass spectrometry | Electricity | 5 | Expired |
| US6498343B2 | Orthogonal ion sampling for APCI mass spectrometry | Electricity | 5 | Expired |
| US7329879B2 | Apparatus for manipulation of ions and methods of making apparatus | Electricity | 4 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.