Harry Cheung
33Patents
16h-index
18Co-inventors
78Inventor score
Filing activity: Jun 21, 1976 → Mar 22, 2018
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4235044A | Split stream methanation process | Chemistry; Metallurgy | 57 | Expired |
| US4934148A | Dry, high purity nitrogen production process and system | Emerging Cross-Sectional Technologies | 47 | Expired |
| US4822395A | Air separation process and apparatus for high argon recovery and moderate pressure nitrogen recovery | Emerging Cross-Sectional Technologies | 43 | Expired |
| US4453957A | Double column multiple condenser-reboiler high pressure nitrogen process | Mechanical Engineering; Lighting; Heating | 37 | Expired |
| US5098457A | Method and apparatus for producing elevated pressure nitrogen | Emerging Cross-Sectional Technologies | 29 | Expired |
| US4058485A | Porous metal-alumina composite | Emerging Cross-Sectional Technologies | 28 | Expired |
| US4560397A | Process to produce ultrahigh purity oxygen | Mechanical Engineering; Lighting; Heating | 27 | Expired |
| US4448595A | Split column multiple condenser-reboiler air separation process | Mechanical Engineering; Lighting; Heating | 23 | Expired |
| US4594085A | Hybrid nitrogen generator with auxiliary reboiler drive | Mechanical Engineering; Lighting; Heating | 22 | Expired |
| US4345925A | Process for the production of high pressure oxygen gas | Emerging Cross-Sectional Technologies | 21 | Expired |
| US4568528A | Process to produce a krypton-xenon concentrate and a gaseous oxygen product | Emerging Cross-Sectional Technologies | 21 | Expired |
| US4193793A | Porous metal-alumina composite | Emerging Cross-Sectional Technologies | 21 | Expired |
| US5463871A | Side column cryogenic rectification system for producing lower purity oxygen | Mechanical Engineering; Lighting; Heating | 20 | Expired |
| US5069698A | Xenon production system | Emerging Cross-Sectional Technologies | 19 | Expired |
| US5237823A | Cryogenic air separation using random packing | Emerging Cross-Sectional Technologies | 19 | Expired |
| US4121917A | Ethylene production with utilization of LNG refrigeration | Emerging Cross-Sectional Technologies | 17 | Expired |
| US4574006A | Process to produce a krypton-xenon concentrate from a liquid feed | Emerging Cross-Sectional Technologies | 15 | Expired |
| US4902321A | Cryogenic rectification process for producing ultra high purity nitrogen | Mechanical Engineering; Lighting; Heating | 15 | Expired |
| US4560398A | Air separation process to produce elevated pressure oxygen | Mechanical Engineering; Lighting; Heating | 14 | Expired |
| US6301923A | Method for generating a cold gas | Mechanical Engineering; Lighting; Heating | 13 | Expired |
| US5074898A | Cryogenic air separation method for the production of oxygen and medium pressure nitrogen | Emerging Cross-Sectional Technologies | 12 | Expired |
| US5385024A | Cryogenic rectification system with improved recovery | Mechanical Engineering; Lighting; Heating | 11 | Expired |
| US4647299A | Process to produce an oxygen-free krypton-xenon concentrate | Emerging Cross-Sectional Technologies | 11 | Expired |
| US4272259A | Gas gettering system | Performing Operations; Transporting | 10 | Expired |
| US5195324A | Cryogenic rectification system for producing nitrogen and ultra high purity oxygen | Mechanical Engineering; Lighting; Heating | 10 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.