Inventor

HARD ROBERT A

US26 patents

⚠️ This page may combine multiple inventors who share the name “HARD ROBERT A”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

HARD ROBERT A

OCCIDENTAL RES CORP

Process for making titanium metal from titanium ore

Process for reducing phosphate ore

Process for producing phosphorus pentoxide or phosphorus or phosphoric acid

Process for reducing phosphate ore

Process for making titanium, zirconium and hafnium-based metal particles for powder metallurgy

Process for making titanium oxide from titanium ore

Method of producing phosphorus pentoxide in a kiln with reduced carbon burnout

Metal powder and sponge and processes for the production thereof

Group IVb transition metal based metal and processes for the production thereof

Method for producing magnesium metal from molten salt

Recovery of shale oil and magnesia from oil shale

Recovery of magnesia from oil shale

CABOT CORP

Method for deoxidizing tantalum material

Dispersible, metal oxide-coated, barium titanate materials

Controlling the oxygen content in tantalum material

Recovery of metal values from process residues

Recovery of metal values

Process for recovering metal values by dissolving them in a sulfuric acid solution containing a carbon source and a reducing agent

Method for solubilizing metal values

Methods to control H2S and arsine emissions

KENNECOTT COPPER CORP

In-situ method and apparatus for sparging gas bubbles

In-situ mining method and apparatus

In-situ mining of copper and nickel

FIFE JAMES A

Article for controlling the oxygen content in tantalum material

HARD ROBERT A

Recovering metal values from geothermal brine

KENNECOTT CORP

In situ exploitation of deep set porphyry ores