Patents by Inventor Michael S. Dupart

Michael S. Dupart 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 maintaining effective corrosion inhibition in gas scrubbing plant
    Patent number: 4690740
    Abstract: Herein is described a technique for maintaining a copper ion in the plus 2 oxidation state, as it is employed as an inhibitor in an alkanolamine gas conditioning absorbent solution to provide corrosion protection of the metals in contact with the alkanolamine solution. The procedure disclosed for maintaining copper in the plus 2 state is to apply an induced or impressed voltage across a point, or several points, in the circulating copper containing solution of the gas conditioning plate for the recovery of CO.sub.2 from flue gas particularly when oxygen is present in the gas being treated.
    Type: Grant
    Filed: March 7, 1986
    Date of Patent: September 1, 1987
    Assignee: The Dow Chemical Company
    Inventors: David C. Cringle, Roscoe L. Pearce, Michael S. DuPart
  • Bismuth inhibitors for acid gas conditioning solutions
    Patent number: 4452764
    Abstract: A corrosion inhibited composition containing an aqueous gas conditioning solution such as an alkanolamine with small amounts of soluble trivalent bismuth compounds. The compositions are useful to separate acid gases such as carbon dioxide from feed streams in gas conditioning apparatus with minimum amounts of corrosion of the stainless steel.
    Type: Grant
    Filed: July 22, 1983
    Date of Patent: June 5, 1984
    Assignee: The Dow Chemical Company
    Inventors: Billy D. Oakes, Michael S. Dupart, David C. Cringle
  • Method and compositions for reducing corrosion in the removal of acidic gases from gaseous mixtures
    Patent number: 4446119
    Abstract: A corrosion inhibited composition containing a gas conditioning solution such as an alkanol amine with water or with organic solvents and with small amounts of soluble thiocyanate compounds, soluble trivalent bismuth compounds with or without soluble divalent nickel or cobalt compounds. The compositions are useful to separate acid gases such as carbon dioxide from hydrocarbon feed streams in gas conditioning apparatus with minimum amounts of corrosion of the ferrous surfaces.
    Type: Grant
    Filed: April 29, 1982
    Date of Patent: May 1, 1984
    Assignee: The Dow Chemical Company
    Inventors: Michael S. DuPart, Billy D. Oakes, David C. Cringle
  • Bismuth inhibitors for acid gas conditioning solutions
    Patent number: 4420337
    Abstract: A corrosion inhibited composition containing an aqueous gas conditioning solution such as an alkanolamine with small amounts of soluble trivalent bismuth compounds. The compositions are useful to separate acid gases such as carbon dioxide from feed streams in gas conditioning apparatus with minimum amounts of corrosion of the stainless steel.
    Type: Grant
    Filed: July 1, 1982
    Date of Patent: December 13, 1983
    Assignee: The Dow Chemical Company
    Inventors: Billy D. Oakes, Michael S. Dupart, David C. Cringle