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:
Feb. 27, 2001
Filed:
Aug. 19, 1999
Applicant:
Inventors:
Karlheinz Reichert, Wolfenbüttel, DE;
Rüdiger Wolf, Vienenburg, DE;
Christine Rawohl, Hildesheim, DE;
Assignee:
H. C. Starck GmbH & Co. KG, Goslar, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B22F 3/02 ; C22B 3/424 ;
U.S. Cl.
CPC ...
B22F 3/02 ; C22B 3/424 ;
Abstract
The invention relates a tantalum powder free of alkali and fluorine, which for a relatively small primary particle size has comparatively large secondary particles and is suitable for producing capacitors with a specific charge of between 100,000 and 180,000 &mgr;FV/g at specific residual currents of less than 2nA/&mgr;FV.