Patents by Inventor Samuel A. Gardner

Samuel A. Gardner 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).

  • Desulfurization of phosphogypsum
    Patent number: 4503018
    Abstract: Phosphogypsum is mixed with fine coal, balled, and charged to a travelling grate where the charge is heated under reducing conditions to evolve sulfur and/or sulfur dioxide for conversion into sulfuric acid.
    Type: Grant
    Filed: February 14, 1983
    Date of Patent: March 5, 1985
    Assignee: Davy McKee Corporation
    Inventors: Samuel A. Gardner, Thomas E. Ban
  • Reciprocating saw blade
    Patent number: D720585
    Type: Grant
    Filed: January 20, 2014
    Date of Patent: January 6, 2015
    Inventors: Samuel Gardner, Donald Gardner, Hugh Gardner