The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 12, 2014
Filed:
Oct. 22, 2010
Helmut Haas, Schladen-Beuchte, DE;
Ulrich Bartmann, Goslar, DE;
Tadashi Komeya, Ibaraki, JP;
Nobuyuki Sato, Ibaraki, JP;
Helmut Haas, Schladen-Beuchte, DE;
Ulrich Bartmann, Goslar, DE;
Tadashi Komeya, Ibaraki, JP;
Nobuyuki Sato, Ibaraki, JP;
H. C. Starck GmbH & Co. KG, , DE;
Abstract
Process for the production of valve metal powders, in particular niobium and tantalum powder, by reduction of corresponding valve metal oxide powders by means of vaporous reducing metals and/or hydrides thereof, preferably in the presence of an inert carrier gas, wherein the reduction is performed at a vapor partial pressure of the reducing metal/metal hydride of 5 to 110 hPa and an overall pressure of less than 1000 hPa, and tantalum powder obtainable in this way having a high stability of the powder agglomerate particles.