Patents by Inventor Craig F. Hafner

Craig F. Hafner has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • METHOD FOR THE PRODUCTION OF TANTALUM POWDER USING RECLAIMED SCRAP AS SOURCE MATERIAL
    Publication number: 20110214534
    Abstract: A process for obtaining tantalum powder from tantalum containing scrap material is provided. The process includes selecting source material, such as from sintered anodes for capacitors, hydriding the source material, milling to desired particle size and surface area, dehydriding, deoxidizing, agglomerating, sifting, and acid treating to obtain tantalum powder of a desired size and purity.
    Type: Application
    Filed: May 10, 2011
    Publication date: September 8, 2011
    Inventors: Joseph Smokovich, Craig F. Hafner
  • Method for the production of tantalum powder using reclaimed scrap as source material
    Patent number: 7981191
    Abstract: A process for obtaining tantalum powder from tantalum containing scrap material is provided. The process includes selecting source material, such as from sintered anodes for capacitors, hydriding the source material, milling to desired particle size and surface area, dehydriding, deoxidizing, agglomerating, sifting, and acid treating to obtain tantalum powder of a desired size and purity.
    Type: Grant
    Filed: October 9, 2008
    Date of Patent: July 19, 2011
    Assignee: Hi-Temp Specialty Metals, Inc.
    Inventors: Joseph Smokovich, Craig F. Hafner
  • METHOD FOR THE PRODUCTION OF TANTALUM POWDER USING RECLAIMED SCRAP AS SOURCE MATERIAL
    Publication number: 20090095130
    Abstract: A process for obtaining tantalum powder from tantalum containing scrap material is provided. The process includes selecting source material, such as from sintered anodes for capacitors, hydriding the source material, milling to desired particle size and surface area, dehydriding, deoxidizing, agglomerating, sifting, and acid treating to obtain tantalum powder of a desired size and purity.
    Type: Application
    Filed: October 9, 2008
    Publication date: April 16, 2009
    Inventors: Joseph Smokovich, Craig F. Hafner