Patents by Inventor Charles D. Starkey

Charles D. Starkey 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 removing amine contaminants from equipment used in the production of polyether polyols
    Patent number: 11529657
    Abstract: Methods of removing amine contaminants from equipment used in the production of polyether polyols. These methods include: (a) contacting the equipment with an aqueous solution of a first acid; (b) discharging the aqueous solution of the first acid from the equipment; (c) contacting the equipment with an aqueous solution of an acidic metal conditioner; (d) discharging the aqueous solution of the acidic metal conditioner from the equipment; (e) contacting the equipment with an aqueous solution of an alkali metal hydroxide; and (f) discharging the aqueous solution of the alkali metal hydroxide from the equipment.
    Type: Grant
    Filed: March 9, 2021
    Date of Patent: December 20, 2022
    Assignee: Covestro LLC
    Inventors: Jenna L. Caputo, Mark A. Christman, II, Charles D. Starkey, Daniel R. Wagner, Nigel Barksby
  • METHODS FOR REMOVING AMINE CONTAMINANTS FROM EQUIPMENT USED IN THE PRODUCTION OF POLYETHER POLYOLS
    Publication number: 20220288652
    Abstract: Methods of removing amine contaminants from equipment used in the production of polyether polyols. These methods include: (a) contacting the equipment with an aqueous solution of a first acid; (b) discharging the aqueous solution of the first acid from the equipment; (c) contacting the equipment with an aqueous solution of an acidic metal conditioner; (d) discharging the aqueous solution of the acidic metal conditioner from the equipment; (e) contacting the equipment with an aqueous solution of an alkali metal hydroxide; and (f) discharging the aqueous solution of the alkali metal hydroxide from the equipment.
    Type: Application
    Filed: March 9, 2021
    Publication date: September 15, 2022
    Inventors: Jenna L. Caputo, Mark A. Christman, II, Charles D. Starkey, Daniel R. Wagner, Nigel Barksby