Specialized metallurgical processes – compositions for use therei – Processes – Producing or purifying free metal powder or producing or...
Reexamination Certificate
2005-02-01
2005-02-01
Wyszomierski, George (Department: 1742)
Specialized metallurgical processes, compositions for use therei
Processes
Producing or purifying free metal powder or producing or...
C075S363000, C075S369000, C423S592100, C423S606000, C423S610000
Reexamination Certificate
active
06849104
ABSTRACT:
High purity refractory metals, valve metals, refractory metal oxides, valve metal oxides, or alloys thereof suitable for a variety of electrical, optical and mill product/fabricated parts usages are produced from their respective oxides by metalothermic reduction of a solid or liquid form of such oxide using a reducing agent that establishes (after ignition) a highly exothermic reaction, the reaction preferably taking place in a continuously or step-wise moving oxide such as gravity fall with metal retrievable at the bottom and an oxide of the reducing agent being removable as a gas or in other convenient form and unreacted reducing agent derivatives being removable by leaching or like process.
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Conlon Anastasia M.
Goldberg Howard V.
Lanin Leonid L.
Shekhter Leonid N.
Tripp Terrance B.
Akorli Godfried R.
Eyl Diderico van
H. C. Starck Inc.
Wyszomierski George
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