John M. Lee
42Patents
18h-index
24Co-inventors
81Inventor score
Filing activity: Apr 14, 1975 → Mar 25, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4116858A | Recovery of lithium from brines | Chemistry; Metallurgy | 86 | Expired |
| US4159311A | Recovery of lithium from brines | Chemistry; Metallurgy | 84 | Expired |
| US4347327A | Recovery of lithium from brines | Emerging Cross-Sectional Technologies | 65 | Expired |
| US4348297A | Crystalline lithium aluminates | Emerging Cross-Sectional Technologies | 61 | Expired |
| US4348296A | Crystalline lithium aluminates | Chemistry; Metallurgy | 57 | Expired |
| US4116856A | Recovery of lithium from brines | Chemistry; Metallurgy | 57 | Expired |
| US4221767A | Recovery of lithium from brines | Emerging Cross-Sectional Technologies | 50 | Expired |
| USD487551S1 | Foldable vehicle work mat | General | 49 | Expired |
| US4376100A | Lithium halide brine purification | Chemistry; Metallurgy | 49 | Expired |
| US4248941A | Solid electrolyte electrochemical cell | Emerging Cross-Sectional Technologies | 47 | Expired |
| US4430311A | Alumina compounds in ion exchange resins | Chemistry; Metallurgy | 44 | Expired |
| US4192907A | Electrochemical cell electrodes incorporating noble metal-base metal alloy catalysts | Emerging Cross-Sectional Technologies | 38 | Expired |
| US4381349A | Alumina compounds in ion exchange resins | Emerging Cross-Sectional Technologies | 32 | Expired |
| US4392979A | Magnesium aluminate anion exchangers | Chemistry; Metallurgy | 25 | Expired |
| US4917390A | Hydraulic seal assembly | Emerging Cross-Sectional Technologies | 23 | Expired |
| US6347585B1 | Variable gap stabilizer | Performing Operations; Transporting | 22 | Expired |
| US4116857A | Recovery of Mg.sup.++ from brines | Chemistry; Metallurgy | 18 | Expired |
| US9677389B2 | Dart valve assembly for a bypass plunger | Mechanical Engineering; Lighting; Heating | 18 | Active |
| US4488949A | Removal of sulfate ions from brine | Chemistry; Metallurgy | 14 | Expired |
| US4446201A | Transition metal aluminates supported on a substrate | Emerging Cross-Sectional Technologies | 12 | Expired |
| US4333846A | Transition metal aluminates | Emerging Cross-Sectional Technologies | 12 | Expired |
| US4415677A | Removal of sulfate ions from brine using composite of polymeric zirconium hydrous oxide in macroporous matrix | Performing Operations; Transporting | 11 | Expired |
| US4392980A | Transition metal aluminates | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4326961A | Magnesium aluminate anion exchangers | Chemistry; Metallurgy | 9 | Expired |
| US4405576A | Removal of sulfate ions from brine | Chemistry; Metallurgy | 6 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.