Patents by Inventor Mary D. Havlicek

Mary D. Havlicek 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
  • Chemical purification cartridge
    Publication number: 20020190002
    Abstract: Provided are cartridges, apparatuses and methods for purifying a liquid chemical. The cartridges include a conduit connected to receive a flow of a chemical to be purified. A packed section in the conduit comprises a purification material. The ratio of the length of the packed section to the inside diameter of the conduit is from about 8:1 to about 200:1. The flow of the chemical to be purified contacts the purification material, thereby producing a flow of a purified chemical. This invention has particular applicability to the semiconductor manufacturing industry.
    Type: Application
    Filed: April 4, 2001
    Publication date: December 19, 2002
    Inventors: Karl J. Urquhart, Joe G. Hoffman, David Snyder, Vinod Raghavan, Mary D. Havlicek, John Geurian