Robert O'Brien
22Patents
8h-index
9Co-inventors
68Inventor score
Filing activity: Jun 17, 1982 → Jun 10, 2003
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6096209A | Three media silver recovery apparatus | Chemistry; Metallurgy | 67 | Expired |
| US5104649A | Surface-functionalized biocidal polymers | Chemistry; Metallurgy | 28 | Expired |
| US5711922A | Preferential hydrometallurgical conversion of zinc sulfide to sulfate from zinc sulfide containing ores and concentrates | Emerging Cross-Sectional Technologies | 25 | Expired |
| US4933052A | Process for the preparation of continuous bilayer electronically-conductive polymer films | Chemistry; Metallurgy | 17 | Expired |
| US4474056A | Erythrocyte settling rate meter | Physics | 15 | Expired |
| US5484579A | Hydrometallurical recovery of copper and zinc from complex sulfide ores | Emerging Cross-Sectional Technologies | 13 | Expired |
| US6836098B1 | Battery charging method using supercapacitors at two stages | Electricity | 12 | Expired |
| US5051157A | Spacer for an electrochemical apparatus | Performing Operations; Transporting | 8 | Expired |
| US6303133A | Film-spreading powder for suppressing water evaporation | Human Necessities | 5 | Expired |
| US5188713A | Process for recovery of metal | Emerging Cross-Sectional Technologies | 5 | Expired |
| US6556424B2 | Supercapacitor with magnetized parts | Emerging Cross-Sectional Technologies | 4 | Expired |
| US6194093A | Magnetized current collectors combined with magnetic shielding means | Emerging Cross-Sectional Technologies | 4 | Expired |
| US4566315A | Meter for measuring erythrocyte settling rates | Physics | 4 | Expired |
| US5681540A | Process for the recovery of sulfur from a feed stock | Emerging Cross-Sectional Technologies | 3 | Expired |
| US7198797B2 | Process for making larvicidal evaporation suppressant powder | Human Necessities | 3 | Expired |
| US6536485B1 | Room temperature hydrogen packaging using a solvent | Emerging Cross-Sectional Technologies | 3 | Expired |
| US5788949A | Liquid phase conversion of a source of sulfur dioxide to sulfuric acid | Performing Operations; Transporting | 3 | Expired |
| US6558705B2 | Composition for reducing evaporation at sites both on land and open water | Human Necessities | 2 | Expired |
| US6284212A | Method of nitric acid formation using a catalytic solution | Chemistry; Metallurgy | 2 | Expired |
| US7045042B2 | Gas-collecting electrets as magneto-electrolysis cell components | Emerging Cross-Sectional Technologies | 1 | Expired |
| US6741440B2 | Mechanically pulsed magnetization kit | Electricity | 1 | Expired |
| US6943141B2 | Process for making a liquid evaporation retardant solution | Performing Operations; Transporting | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.