Freeport-McMoRan, Inc.
🏢 View company profile →59Patents
51Active
59Granted
53Portfolio score
Filing activity: Jun 3, 1988 → Aug 19, 2022 · 21 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5147618A | Process for recovery of gold from refractory gold ores using sulfurous acid as the leaching agent | Emerging Cross-Sectional Technologies | 30 | Expired |
| US5147617A | Process for recovery of gold from gold ores using a complexing pretreatment and sulfurous acid leaching | Emerging Cross-Sectional Technologies | 26 | Expired |
| US4919715A | Treating refractory gold ores via oxygen-enriched roasting | Emerging Cross-Sectional Technologies | 23 | Expired |
| US5340383A | Reduction of particulate sulfur emissions from liquid sulfur storage tanks | Chemistry; Metallurgy | 22 | Expired |
| US8420048B1 | System and method for parallel solution extraction of one or more metal values from metal-bearing materials | Emerging Cross-Sectional Technologies | 14 | Active |
| US7591934B2 | Apparatus for producing metal powder by electrowinning | Chemistry; Metallurgy | 13 | Active |
| US8003064B2 | Controlled copper leach recovery circuit | Emerging Cross-Sectional Technologies | 13 | Active |
| US7736475B2 | System and method for producing copper powder by electrowinning using the ferrous/ferric anode reaction | Chemistry; Metallurgy | 12 | Active |
| US8372361B2 | Copper recovery circuit | Emerging Cross-Sectional Technologies | 9 | Active |
| US8273237B2 | Method and apparatus for electrowinning copper using an atmospheric leach with ferrous/ferric anode reaction electrowinning | Emerging Cross-Sectional Technologies | 9 | Active |
| US4961777A | Pretreatment/agglomeration as a vehicle for refractory ore treatment | Emerging Cross-Sectional Technologies | 9 | Expired |
| US8372360B2 | Controlled metal leach recovery circuit | Chemistry; Metallurgy | 9 | Active |
| US8491701B2 | Methods and systems for leaching a metal-bearing ore for the recovery of a metal value | Emerging Cross-Sectional Technologies | 7 | Active |
| US7736476B2 | System and method for producing metal powder by electrowinning | Chemistry; Metallurgy | 7 | Active |
| US8038855B2 | Anode structure for copper electrowinning | Emerging Cross-Sectional Technologies | 7 | Active |
| US7736486B2 | System and method for producing copper power by electrowinning in a flow-through electrowinning cell | Chemistry; Metallurgy | 7 | Active |
| US7736488B2 | Process for recovery of copper from copper-bearing material using pressure leaching, direct electrowinning and solvent/solution extraction | Emerging Cross-Sectional Technologies | 6 | Active |
| US5106603A | Method for removing sulfur dioxide from gas streams | Performing Operations; Transporting | 5 | Expired |
| US7666371B2 | Method for recovering metal values from metal-containing materials using high temperature pressure leaching | Emerging Cross-Sectional Technologies | 5 | Active |
| US5236676A | Pressure chlorination of refractory gold ores | Emerging Cross-Sectional Technologies | 5 | Expired |
| US7736487B2 | Process for recovery of copper from copper-bearing material using pressure leaching, direct electrowinning and solution extraction | Emerging Cross-Sectional Technologies | 5 | Active |
| US8022004B2 | Multi-coated electrode and method of making | Emerging Cross-Sectional Technologies | 5 | Active |
| US8016983B2 | System and method for producing copper powder by electrowinning in a flow-through electrowinning cell | Chemistry; Metallurgy | 4 | Active |
| US7722756B2 | Process for multiple stage direct electrowinning of copper | Emerging Cross-Sectional Technologies | 4 | Active |
| US8012318B2 | Process for multiple stage direct electrowinning of copper | Emerging Cross-Sectional Technologies | 4 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.