Keith P. Johnston
39Patents
14h-index
63Co-inventors
84Inventor score
Filing activity: Jun 20, 1996 → Jun 9, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6846565B2 | Light-emitting nanoparticles and method of making same | Emerging Cross-Sectional Technologies | 190 | Expired |
| US6918946B2 | Applications of light-emitting nanoparticles | Emerging Cross-Sectional Technologies | 149 | Expired |
| US9133709B2 | Determination of oil saturation in reservoir rock using paramagnetic nanoparticles and magnetic field | Emerging Cross-Sectional Technologies | 68 | Active |
| US7801590B2 | Optical coherence tomographic detection of cells and killing of the same | Human Necessities | 62 | Active |
| US6862890B2 | Process for production of nanoparticles and microparticles by spray freezing into liquid | Mechanical Engineering; Lighting; Heating | 46 | Expired |
| US7722953B2 | Light-emitting nanoparticles comprising octanol as a passivating agent, and method of making same | Emerging Cross-Sectional Technologies | 38 | Expired |
| US7335259B2 | Growth of single crystal nanowires | Emerging Cross-Sectional Technologies | 26 | Expired |
| US8779094B2 | Low viscosity highly concentrated suspensions | Chemistry; Metallurgy | 24 | Active |
| US10092512B2 | Compositions and methods of making brittle-matrix particles through blister pack freezing | Human Necessities | 23 | Active |
| US10434062B2 | Compositions and methods of making brittle-matrix particles through blister pack freezing | Human Necessities | 21 | Active |
| US8973668B2 | Compositions for oil recovery and methods of their use | Fixed Constructions | 19 | Active |
| US6576264B1 | Insoluble drug delivery | Emerging Cross-Sectional Technologies | 17 | Expired |
| US8968786B2 | Formation of stable submicron peptide or protein particles by thin film freezing | Emerging Cross-Sectional Technologies | 16 | Active |
| US5733964A | Surfactants for heterogeneous processes in liquid or supercritical CO.sub.2 | Emerging Cross-Sectional Technologies | 15 | Expired |
| US10285945B2 | Formation of stable submicron peptide or protein particles by thin film freezing | Emerging Cross-Sectional Technologies | 14 | Active |
| US6756062B2 | Preparation of drug particles using evaporation precipitation into aqueous solutions | Performing Operations; Transporting | 14 | Expired |
| US9044391B2 | Enhanced delivery of immunosuppressive drug compositions for pulmonary delivery | Human Necessities | 14 | Active |
| US9622974B2 | Formation of stable submicron peptide or protein particles by thin film freezing | Emerging Cross-Sectional Technologies | 13 | Active |
| US9061027B2 | Enhanced delivery of drug compositions to treat life threatening infections | Human Necessities | 12 | Active |
| US10231955B2 | Enhanced delivery of immunosuppressive drug compositions for pulmonary delivery | Human Necessities | 11 | Active |
| US6974593B2 | Insoluble drug delivery | Emerging Cross-Sectional Technologies | 10 | Expired |
| US8163633B2 | Light-emitting nanoparticles and method of making same | Electricity | 10 | Active |
| US9724344B2 | Enhanced delivery of drug compositions to treat life threatening infections | Human Necessities | 9 | Active |
| US8618595B2 | Applications of light-emitting nanoparticles | Emerging Cross-Sectional Technologies | 7 | Active |
| US7670581B2 | Light-emitting nanoparticles and methods of making same | Emerging Cross-Sectional Technologies | 6 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.