Qi Ma
17Patents
5h-index
23Co-inventors
66Inventor score
Filing activity: Mar 14, 1997 → Jun 13, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5863428A | Guard cartridge for chromatography | Physics | 26 | Expired |
| US6162362A | Direct screw-on cartridge holder with self-adjustable connection | Physics | 19 | Expired |
| US6904936B2 | Flow-diverting rotary valves of multiple paths | Emerging Cross-Sectional Technologies | 14 | Expired |
| US6705113B2 | Olefin plant refrigeration system | Emerging Cross-Sectional Technologies | 10 | Expired |
| US6805799B2 | Simulated moving bed chromatographic focusing | Performing Operations; Transporting | 6 | Expired |
| US6637237B1 | Olefin plant refrigeration system | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| US5938909A | Cup-shaped vertical slab gel electrophoresis apparatus | Physics | 2 | Expired |
| US10899974B2 | Light oil reflux heavies removal process | Mechanical Engineering; Lighting; Heating | 2 | Active |
| US9335091B2 | Nitrogen rejection unit | Mechanical Engineering; Lighting; Heating | 2 | Active |
| US10211578B2 | Audio output jack | Electricity | 0 | Active |
| US11604025B2 | Standalone high-pressure heavies removal unit for LNG processing | Mechanical Engineering; Lighting; Heating | 0 | Active |
| US12122964B2 | Light oil reflux heavies removal process | Mechanical Engineering; Lighting; Heating | 0 | Active |
| US11465603B2 | Electric hovercraft for sports competitions | Performing Operations; Transporting | 0 | Active |
| US12111101B2 | Two-stage heavies removal in lng processing | Mechanical Engineering; Lighting; Heating | 0 | Active |
| US12050055B2 | Lean gas LNG heavies removal process using NGL | Mechanical Engineering; Lighting; Heating | 0 | Active |
| US11713423B2 | Light oil reflux heavies removal process | Mechanical Engineering; Lighting; Heating | 0 | Active |
| US11320197B2 | Alternative two column HRU design with rich reflux | Mechanical Engineering; Lighting; Heating | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.