Patents by Inventor Robin M. Stewart

Robin M. Stewart 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).

  • Methods for solidification and stabilization of industrial byproducts
    Patent number: 11358117
    Abstract: An agglomerate is provided that can include an aluminosilicate (ash) base material and one or more of a binding agent or leach reduction agent. Each of the agglomerate and binding agent can include no more than about 25 wt. % cement.
    Type: Grant
    Filed: May 31, 2019
    Date of Patent: June 14, 2022
    Assignee: ADA-ES, Inc.
    Inventors: Ramon E. Bisque, Kenneth E. Baldrey, Robin M. Stewart, George Rouse, Natalie Caro
  • METHODS FOR SOLIDIFICATION AND STABILIZATION OF INDUSTRIAL BYPRODUCTS
    Publication number: 20190282995
    Abstract: An agglomerate is provided that can include an aluminosilicate (ash) base material and one or more of a binding agent or leach reduction agent. Each of the agglomerate and binding agent can include no more than about 25 wt. % cement.
    Type: Application
    Filed: May 31, 2019
    Publication date: September 19, 2019
    Inventors: Ramon E. Bisque, Kenneth E. Baldrey, Robin M. Stewart, George Rouse, Natalie Caro
  • Methods for solidification and stabilization of industrial byproducts
    Patent number: 10357755
    Abstract: An agglomerate is provided that can include an aluminosilicate (ash) base material and one or more of a binding agent or leach reduction agent. Each of the agglomerate and binding agent can include no more than about 25 wt. % cement.
    Type: Grant
    Filed: July 8, 2016
    Date of Patent: July 23, 2019
    Assignee: ADA-ES, Inc.
    Inventors: Ramon E. Bisque, Kenneth E. Baldrey, Robin M. Stewart, George Rouse, Natalie Caro
  • Methods for solidification and stabilization of industrial byproducts
    Patent number: 9662630
    Abstract: An agglomerate is provided that can include an aluminosilicate (ash) base material and one or more of a binding agent or leach reduction agent. Each of the agglomerate and binding agent can include no more than about 25 wt. % cement.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: May 30, 2017
    Assignee: ADA-ES, INC.
    Inventors: Ramon E. Bisque, Kenneth E. Baldrey, Robin M. Stewart, George Rouse, Natalie Caro
  • METHODS FOR SOLIDIFICATION AND STABILIZATION OF INDUSTRIAL BYPRODUCTS
    Publication number: 20160318000
    Abstract: An agglomerate is provided that can include an aluminosilicate (ash) base material and one or more of a binding agent or leach reduction agent. Each of the agglomerate and binding agent can include no more than about 25 wt. % cement.
    Type: Application
    Filed: July 8, 2016
    Publication date: November 3, 2016
    Inventors: Ramon E. Bisque, Kenneth E. Baldrey, Robin M. Stewart, George Rouse, Natalie Caro
  • METHODS FOR SOLIDIFICATION AND STABILIZATION OF INDUSTRIAL BYPRODUCTS
    Publication number: 20140261089
    Abstract: An agglomerate is provided that can include an aluminosilicate (ash) base material and one or more of a binding agent or leach reduction agent. Each of the agglomerate and binding agent can include no more than about 25 wt. % cement.
    Type: Application
    Filed: March 14, 2014
    Publication date: September 18, 2014
    Inventors: Ramon E. Bisque, Kenneth E. Baldrey, Robin M. Stewart, George Rouse, Natalie Caro
  • Method and apparatus for stabilizing liquid elemental mercury
    Patent number: 6403044
    Abstract: The present invention is directed to a system and method for converting hazardous speciated and elemental mercury-containing wastes to environmentally acceptable wastes by mixing the wastes in the presence of a polysulfide, water, and an mercury-reactive material, such as elemental sulfur.
    Type: Grant
    Filed: February 26, 1999
    Date of Patent: June 11, 2002
    Assignee: ADA Technologies, Inc.
    Inventors: John E. Litz, Thomas Broderick, Robin M. Stewart
  • Mercury removal apparatus and method
    Patent number: 5409522
    Abstract: The present invention discloses an apparatus and process for removing particulate material and mercury-containing compounds from a gas stream. The apparatus includes a particulate removal means to remove the particulate material and a mercury collection means to remove the mercury-containing compounds. The apparatus can selectively remove particulate material and mercury-containing compounds which may be disposed of separately. The mercury collection means is positioned downstream of the particulate removal means and includes a regenerable sorbent. The sorbent is regenerated by elevating the temperature of the sorbent to release the mercury-containing compounds from the sorbent.
    Type: Grant
    Filed: April 20, 1994
    Date of Patent: April 25, 1995
    Assignee: ADA Technologies, Inc.
    Inventors: Michael D. Durham, David E. Hyatt, Robin M. Stewart, Richard J. Schlager