Specialized metallurgical processes – compositions for use therei – Compositions – Loose particulate mixture containing metal particles
Reexamination Certificate
2006-12-19
2006-12-19
Wyszomierski, George P. (Department: 1742)
Specialized metallurgical processes, compositions for use therei
Compositions
Loose particulate mixture containing metal particles
C420S427000, C361S305000, C361S529000
Reexamination Certificate
active
07150776
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.
REFERENCES:
patent: 1602542 (1926-10-01), Marden
patent: 1728941 (1929-09-01), Marden et al.
patent: 2516863 (1950-08-01), Gardner
patent: 2881067 (1959-04-01), Hivert et al.
patent: 2950185 (1960-08-01), Hellier et al.
patent: 3647420 (1972-03-01), Restelli
patent: 3658507 (1972-04-01), Gohin et al.
patent: 4569693 (1986-02-01), Albrecht et al.
patent: 4740238 (1988-04-01), Schiele
patent: 4954169 (1990-09-01), Behrens
patent: 5082491 (1992-01-01), Rerat
patent: 5356120 (1994-10-01), König et al.
patent: 5707599 (1998-01-01), Northway
patent: 5954856 (1999-09-01), Pathare et al.
patent: 6171363 (2001-01-01), Shekhter et al.
patent: 6558447 (2003-05-01), Shekhter et al.
patent: 2 231 883 (1990-11-01), None
patent: 02/090024 (2002-11-01), None
Conlon Anastasia M.
Goldberg Howard V.
Lanin Leonid L.
Shekhter Leonid N.
Tripp Terrance B.
Gil Joseph C.
H.C. Starck Inc.
Wyszomierski George P.
LandOfFree
Metalothermic reduction of refractory metal oxides does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Metalothermic reduction of refractory metal oxides, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Metalothermic reduction of refractory metal oxides will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3703805