Patents

4,244,734 Process for recovering metal values from materials containing arsenic
4,239,529 Process for beneficiating sulfide ores
4,229,209 Process for beneficiating gold
4,205,979 Process for beneficiating oxide ores
4,192,676 High temperature reduction of copper salts
4,182,308 Solar energy collector
4,175,924 Treatment of coal with metal containing compounds
4,159,310 Process for recovering aluminum and other metal values from fly ash
4,138,312 Process of recovering sodium carbonate from spent pulping liquors
4,134,907 Process for enhancing the fuel value of low BTU gas
4,124,379 Recovery of silver from cuprous chloride solutions by amalgamation
4,120,665 Process for improving coal
4,119,410 Process for improving coal
4,108,635 Solder skimmings recovery process
4,107,261 Process for the separation of platinum group metals
4,101,315 Recovery of silver from cuprous chloride solutions by co-crystallization with sodium chloride
4,098,584 Removal of impurities from coal
4,085,027 Hybrid bipolar electrode
4,071,357 Process for recovering zinc from steel-making flue dust
4,053,301 Process for the direct production of steel

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