MINTEK
21Patents
8Active
21Granted
40Portfolio score
Filing activity: Dec 13, 1989 → Sep 24, 2020 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6280630A | Process for the treatment of effluent streams | Emerging Cross-Sectional Technologies | 18 | Expired |
| US5114700A | Electrically heated fluidized bed reactor and processes employing same | Emerging Cross-Sectional Technologies | 18 | Expired |
| US6277341A | Process for the rapid leaching of chalcopyrite in the absence of catalysts | Emerging Cross-Sectional Technologies | 12 | Expired |
| US6699302B1 | Treatment of metal sulphide concentrates by roasting and electrically stabilized open-arc furnace smelt reduction | Emerging Cross-Sectional Technologies | 12 | Expired |
| US5134169A | Gold selective ion exchange resins | Emerging Cross-Sectional Technologies | 10 | Expired |
| US5132024A | Hydro-cyclone underflow monitor based on underflow slurry stream shape | Performing Operations; Transporting | 10 | Expired |
| US6287362A | Production of metal lumps and apparatus therefor | Chemistry; Metallurgy | 9 | Expired |
| US5317592A | Direct resistance heating electrical furnace assembly and method of operating same | Mechanical Engineering; Lighting; Heating | 9 | Expired |
| US5395583A | Stainless steel composition | Chemistry; Metallurgy | 8 | Expired |
| US5248442A | Method and apparatus for measuring shade of hydrocyclone underflow | Physics | 6 | Expired |
| US5575303A | Process for controlling a series of flotation cells | Emerging Cross-Sectional Technologies | 4 | Expired |
| US10047412B2 | Gold recovery from carbon | Emerging Cross-Sectional Technologies | 2 | Active |
| US7641711B2 | Metal vapour condensation and liquid metal withdrawal | Emerging Cross-Sectional Technologies | 2 | Active |
| US9784500B2 | Measurement of electrical variables on a DC furnace | Mechanical Engineering; Lighting; Heating | 1 | Active |
| US12428324B2 | Water balance improvement in an effluent treatment process for sulphate removal | Chemistry; Metallurgy | 0 | Active |
| US12023687B2 | Froth flotation apparatus | Performing Operations; Transporting | 0 | Active |
| US10676381B2 | Effluent treatment process for sulphate removal | Chemistry; Metallurgy | 0 | Active |
| US5045280A | Intermetallic compounds | Human Necessities | 0 | Expired |
| US10710911B2 | Effluent treatment process—pH refinement for sulphate removal | Chemistry; Metallurgy | 0 | Active |
| US5503691A | The aesthetic enhancement or modification of articles or components made of non-ferrous metals | Chemistry; Metallurgy | 0 | Expired |
| US10894998B2 | Processing of iron-rich rare earth bearing ores | Emerging Cross-Sectional Technologies | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.