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:
Jan. 10, 2006
Filed:
Jan. 14, 2002
Patrick M. Brown, Exton, PA (US);
Rong-chein R. Wu, Phoenixville, PA (US);
Raymond C. Pedicone, Pottstown, PA (US);
Michael G. Madara, Shillington, PA (US);
Patrick M. Brown, Exton, PA (US);
Rong-Chein R. Wu, Phoenixville, PA (US);
Raymond C. Pedicone, Pottstown, PA (US);
Michael G. Madara, Shillington, PA (US);
Cabot Corporation, Boston, MA (US);
Abstract
A process for producing valve metal oxides, such as tantalum pentoxide or niobium pentoxide with a narrow particle size distribution within a desired particle size range, is provided. According to the process of the present invention, the valve metal fraction from digestion of valve metal material containing ore is processed under controlled temperature, pH, and residence time conditions to produce the valve metal pentoxide and pentoxide hydrates. Also, disclosed are new tantalum pentoxide and niobium pentoxide products and new tantalum pentoxide precursors and niobium pentoxide precursors.