Patents by Inventor Ulrike Waltraud Tschirner

Ulrike Waltraud Tschirner 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).

  • Method for the production of improved pulp
    Publication number: 20030221805
    Abstract: Compositions and method for improving properties of pulp produced or reducing the digester cycle time in alkaline chemical pulping processes in which an effective amount of at least one selected phosphonate or carboxylate compound or mixtures thereof is admixed with the alkaline aqueous mixture in the digester of the chemical pulping process. The compositions and method are especially well suited for use in the Kraft pulping process.
    Type: Application
    Filed: June 5, 2002
    Publication date: December 4, 2003
    Inventors: Jacob Owen Thompson, Sheldon Phillip Verrett, Wei Li, Ulrike Waltraud Tschirner
  • Composition for the production of improved pulp
    Patent number: RE41552
    Abstract: Compositions and method for improving properties of pulp produced or reducing the digester cycle time in alkaline chemical pulping processes in which an effective amount of at least one selected phosphonate or carboxylate compound or mixtures thereof is admixed with the alkaline aqueous mixture in the digester of the chemical pulping process. The compositions and method are especially well suited for use in the Kraft pulping process.
    Type: Grant
    Filed: May 9, 2007
    Date of Patent: August 24, 2010
    Assignee: Thermphos Trading GmbH
    Inventors: Wei Li, Ulrike Waltraud Tschirner, Sheldon Phillip Verrett, Jacob Owen Thompson