Patents by Inventor Joel G. Courtwright

Joel G. Courtwright 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 metals from solutions containing chelants
    Patent number: 4846978
    Abstract: Metal chelates in solution are decomposed more effectively and completely by ozonation when magnesium hydroxide is added to the chelate solution prior to ozonation. The process is particularly applicable to waste streams from which it is desired to recover metals to avoid contamination of the environment and/or reuse them.
    Type: Grant
    Filed: November 16, 1988
    Date of Patent: July 11, 1989
    Assignee: The Dow Chemical Company
    Inventors: David J. Leggett, Joel G. Courtwright
  • Use of phenyloxazoles as corrosion inhibitors
    Patent number: 4663121
    Abstract: The corrosion of metals in contact with corrosive fluids is effectively inhibited by the addition of one or more phenyloxazoles, preferably 2,5-diphenyloxazole.
    Type: Grant
    Filed: October 15, 1985
    Date of Patent: May 5, 1987
    Assignee: The Dow Chemical Company
    Inventors: Edwin R. Henson, Joel G. Courtwright
  • Corrosion inhibitors for alkanolamines
    Patent number: 4596849
    Abstract: This invention relates to a corrosion inhibiting composition for ferrous metals and its alloys in gas conditioning service using aqueous monoethanolamine to scrub carbon dioxide containing oxygen. The corrosion inhibiting composition includes a thiourea-amine-formaldehyde based polymer and, in the preferred embodiment, also includes a cupric ion producing material.
    Type: Grant
    Filed: October 29, 1984
    Date of Patent: June 24, 1986
    Assignee: The Dow Chemical Company
    Inventors: Edwin R. Henson, Joel G. Courtwright, Tipton T. Masterson
  • Corrosion inhibitors for alkanolamines
    Patent number: 4595723
    Abstract: This invention relates to a corrosion inhibiting composition for ferrous metals and its alloys in gas conditioning service using aqueous monoethanolamine to scrub carbon dioxide. The corrosion inhibiting composition includes a thiourea-amine-formaldehyde based polymer and, in the preferred embodiment, also includes a nickel ion producing material.
    Type: Grant
    Filed: October 29, 1984
    Date of Patent: June 17, 1986
    Assignee: The Dow Chemical Company
    Inventors: Edwin R. Henson, Tipton T. Masterson, Joel G. Courtwright