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• Concentration of Colorado fluorite ores
• Concentration of oxide manganese ore from Sheep Mountain property, Durkee district, Oreg.
• Beneficiation of oxide and carbonate manganese ores from the Philipsburg District, Granite County, Mont.
• Concentration of oxide manganese ores from the Havasu Lake District, California and Arizona
• Concentration of copper-cobalt ores from the Blackbird District, Lemhi County, Idaho
• Concentration of oxide manganese ores from Lander County, Nev.
• Concentration of oxide and silicate manganese ores from the vicinity of Golconda, Nev.
• Concentration of oxide manganese ores from northeastern Nevada (Caviglia-Vietti, Berning, and Reed-Parker deposits)