Patents by Inventor Marshall E. Cummings

Marshall E. Cummings 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).

  • Resin preconditioning methods using carbon dioxide and methods for purifying hydrogen peroxide
    Patent number: 6875415
    Abstract: Provided are a preconditioned resin and methods of preparation thereof as well as methods for purifying hydrogen peroxide solutions. The method includes preconditioning an anion exchange resin, wherein an anion exchange resin bed is provided and carbon dioxide gas is passed through the resin bed.
    Type: Grant
    Filed: April 4, 2001
    Date of Patent: April 5, 2005
    Assignee: Air Liquide America, LP
    Inventors: Mary D. Havlicek, David L. Snyder, Joe G. Hoffman, Marshall E. Cummings
  • Resin preconditioning methods using carbon dioxide and methods for purifying hydrogen peroxide
    Publication number: 20030018140
    Abstract: Provided are a preconditioned resin and methods of preparation thereof as well as methods for purifying hydrogen peroxide solutions. The method includes preconditioning an anion exchange resin, wherein an anion exchange resin bed is provided and carbon dioxide gas is passed through the resin bed.
    Type: Application
    Filed: April 4, 2001
    Publication date: January 23, 2003
    Inventors: Mary D. Havlicek, David L. Snyder, Joe G. Hoffman, Marshall E. Cummings