United States patents granted to Edward S. Roberts

• 2,502,670 – Method for the production of water gas
• 2,568,963 – Process for the recovery of copper from its ores and minerals
• 2,605,171 – Apparatus for acid sludge decomposition
• 2,647,825 – Precipitation of pure metallic copper from copper-bearing solutions
• 2,689,175 – Production of nitrogenous fertilizers
• 2,750,266 – Catalytic reactor for hydrocyanic acid production
• 2,787,521 – Method of continuously conducting a liquid-gas exothermic reaction
• 2,932,664 – Manufacture of alkali carbamates
• 2,955,917 – Process and apparatus for the manufacture of nitric acid at elevated pressures with full power recovery
• 3,166,390 – Method of making HCNO
• 3,303,021 – Recovery of copper from low-grade copper sulfide ores
• 3,321,303 – Recovery of copper
• 3,405,171 – Oxidation of alkylnaphthalenes to naphthalene carboxylic acids
• 3,425,915 – Purification of high boiling aromatic compounds by codistillation with a chlorinated diphenyl solvent
• 3,724,887 – Kiln seal
• 3,757,410 – Method and apparatus for extruding metal powder to produce a continuous rod
• 3,995,428 – Waste heat recovery system
• 4,019,343 – Refrigeration system using enthalpy converting liquid turbines
• 4,062,673 – Flash smelting of iron with production of hydrogen of hydrogenation quality
• 4,132,546 – Smelting of iron ore with partially dried lignite