Patents by Inventor Dean K. Hanink

Dean K. Hanink 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 of separating ferritic steel or ductile iron from certain nonferrous metals
    Patent number: 4123294
    Abstract: A method is disclosed for treating scrap metal chips and turnings containing a valuable metal layer of silver, gold, or copper and a ductile layer of ferritic steel or ductile iron to recover the valuable metal. The chips and turnings are treated by carburization and quenching to embrittle the steel layers and then crushed converting the steel to a small mesh powder which can be screened from larger sized agglomerates of valuable metal insensitive to the embrittling process.
    Type: Grant
    Filed: January 28, 1977
    Date of Patent: October 31, 1978
    Assignee: General Motors Corporation
    Inventor: Dean K. Hanink