Patents by Inventor Mary Dykstra Havlicek

Mary Dykstra 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).

  • Integrated method of preconditioning a resin for hydrogen peroxide purification and purifying hydrogen peroxide
    Patent number: 6537516
    Abstract: A method of integrated resin preconditioning and hydrogen peroxide purification is provided. The method includes preconditioning a resin by washing the resin with deionized water to produce a washed resin, and contacting an effective amount of a preconditioning hydrogen peroxide solution with the washed resin to remove impurities from the washed resin, thereby producing a preconditioned resin.
    Type: Grant
    Filed: April 4, 2001
    Date of Patent: March 25, 2003
    Assignee: Air Liquide America Corporation
    Inventors: Mary Dykstra Havlicek, Joe G. Hoffman, Wallace Yuan
  • Method of preconditioning a resin for hydrogen peroxide purification, resin prepared therefrom and method of purifying hydrogen peroxide
    Publication number: 20030023005
    Abstract: Provided is a method of preconditioning a resin useful for removal of organic impurities from a hydrogen peroxide solution. The method involves the steps of (a) rinsing the resin with deionized water; (b) contacting the resin with an acid solution; and (c) rinsing the acid treated resin with deionized water. Also provided is a resin preconditioned in accordance with the method, and a method of removing organic impurities from a hydrogen peroxide solution using the preconditioned resin. The invention has particular applicability to the removal of total organic carbon (TOC) impurities from a hydrogen peroxide solution which can be used in the manufacture of semiconductor devices.
    Type: Application
    Filed: April 4, 2001
    Publication date: January 30, 2003
    Inventors: Mary Dykstra Havlicek, Joe G. Hoffman, Wallace Yuan
  • Integrated method of preconditioning a resin for hydrogen peroxide purification and purifying hydrogen peroxide
    Publication number: 20030017103
    Abstract: A method of integrated resin preconditioning and hydrogen peroxide purification is provided. The method includes preconditioning a resin by washing the resin with deionized water to produce a washed resin, and contacting an effective amount of a preconditioning hydrogen peroxide solution with the washed resin to remove impurities from the washed resin, thereby producing a preconditioned resin.
    Type: Application
    Filed: April 4, 2001
    Publication date: January 23, 2003
    Inventors: Mary Dykstra Havlicek, Joe G. Hoffman, Wallace Yuan