Patents by Inventor Joseph Thomas Swartbaugh

Joseph Thomas Swartbaugh 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).

  • Recovery of group III element component from group III-V waste materials
    Patent number: 6126719
    Abstract: The present invention is directed to an apparatus and method for recovering the group III elemental component of a group III-V material waste material. The method includes heating, under a reduced pressure, solid waste materials which contain group III-V material to cause the group III-V material to separate into a group III element and a group V element vapor; drawing off the group V element vapor; condensing the group V element vapor to produce a condensed group V element solid; and zone refining the group III element to produce a purified group III element. The apparatus is designed to carry out this method in the plant which manufactures the group III-V waste material.
    Type: Grant
    Filed: January 21, 1998
    Date of Patent: October 3, 2000
    Assignee: The University of Dayton
    Inventors: Jeffrey Allen Sturgill, Joseph Thomas Swartbaugh