Derek Colman
29Patents
9h-index
27Co-inventors
75Inventor score
Filing activity: Jan 16, 1975 → Dec 6, 2010
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4237006A | Cyclone separator | Performing Operations; Transporting | 52 | Expired |
| US5289043A | Switching system for selectively enabling electrical power to be applied to plural loads | Electricity | 44 | Expired |
| US6057475A | Process for the production of acetic acid | Emerging Cross-Sectional Technologies | 39 | Expired |
| US5120445A | Mixing apparatus and method | Performing Operations; Transporting | 36 | Expired |
| US4576724A | Cyclone separator | Performing Operations; Transporting | 29 | Expired |
| US4251368A | Cyclone separator | Performing Operations; Transporting | 29 | Expired |
| US5001537A | Semiconductor device for electrical overstress protection | Electricity | 26 | Expired |
| US5439991A | Method of mixing heterogeneous systems | Performing Operations; Transporting | 19 | Expired |
| US4764287A | Cyclone separator | Performing Operations; Transporting | 17 | Expired |
| US4977476A | Semiconductor switch | Electricity | 9 | Expired |
| US7535285B2 | Band-gap voltage reference circuit | Emerging Cross-Sectional Technologies | 8 | Active |
| US4260910A | Integrated circuits with built-in power supply protection | Electricity | 8 | Expired |
| US4793924A | Cyclone separator | Performing Operations; Transporting | 8 | Expired |
| US4810382A | Cyclone separator | Performing Operations; Transporting | 7 | Expired |
| US4629555A | Cyclone separator | Performing Operations; Transporting | 6 | Expired |
| US7894491B2 | Data transfer circuit | Physics | 5 | Active |
| US7807860B2 | Autothermal cracking process and reactor | Performing Operations; Transporting | 5 | Active |
| US5959482A | Controlled slew rate bus driver circuit having a high impedance state | Electricity | 5 | Expired |
| US7074838B2 | Process for the catalytic oxidation of hydrocarbons | Chemistry; Metallurgy | 4 | Expired |
| US4722796A | Cyclone separator | Performing Operations; Transporting | 3 | Expired |
| US5973219A | Isobutene polymerization process | Chemistry; Metallurgy | 3 | Expired |
| US4849107A | Cyclone separator | Performing Operations; Transporting | 3 | Expired |
| US7519484B2 | Power supply monitor | Physics | 1 | Active |
| US4604640A | Darlington transistors | Electricity | 1 | Expired |
| US8608089B2 | Nozzle for use in fluidized catalytic cracking | Chemistry; Metallurgy | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.