Patents by Inventor Falk Liebner

Falk Liebner 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).

  • Substrate for soil improvement having a water-storing property, method for producing same, and use thereof
    Patent number: 9528046
    Abstract: In a method for producing a substrate for soil improvement with water-storing property on the basis of lignin, lignin is provided and oxidized alternatively in an aqueous alkaline or a pH-neutral aqueous suspension, wherein the pH-neutral aqueous suspension after oxidation of the lignin is converted into an alkaline medium. The lignin is cross-linked in an aqueous alkaline medium by multi-functional compounds. Subsequently, the lignin is neutralized, dried, and comminuted. The produced lignin is used as a substrate for improvement of soil properties in that the substrate is used as a water storage that, compared to water storages of non-modified technical lignins, exhibits a significantly higher water adsorption capacity or swelling capacity.
    Type: Grant
    Filed: January 14, 2015
    Date of Patent: December 27, 2016
    Assignee: Technische Universität Dresden
    Inventors: Lars Passauer, Falk Liebner, Klaus Fischer, Joachim Katzur
  • Substrate for Soil Improvement Having a Water-Storing Property, Method for Producing Same, and Use Thereof
    Publication number: 20150175882
    Abstract: In a method for producing a substrate for soil improvement with water-storing property on the basis of lignin, lignin is provided and oxidized alternatively in an aqueous alkaline or a pH-neutral aqueous suspension, wherein the pH-neutral aqueous suspension after oxidation of the lignin is converted into an alkaline medium. The lignin is cross-linked in an aqueous alkaline medium by multi-functional compounds. Subsequently, the lignin is neutralized, dried, and comminuted. The produced lignin is used as a substrate for improvement of soil properties in that the substrate is used as a water storage that, compared to water storages of non-modified technical lignins, exhibits a significantly higher water adsorption capacity or swelling capacity.
    Type: Application
    Filed: January 14, 2015
    Publication date: June 25, 2015
    Inventors: Lars Passauer, Falk Liebner, Klaus Fischer, Joachim Katzur
  • Substrate for soil improvement having a water-storing property, method for producing same, and use thereof
    Patent number: 8993735
    Abstract: The invention relates to a method for producing a lignin-based substrate for soil improvement having a water-storing property, characterized by the following steps: providing lignin, oxidizing the lignin in either an aqueous alkaline suspension or a pH-neutral aqueous suspension, the pH-neutral aqueous suspension being converted into an alkaline substance after the lignin has been oxidized, cross-linking the lignin in an aqueous alkaline medium using multifunctional compounds, and neutralizing, drying, and comminuting the lignin.
    Type: Grant
    Filed: February 10, 2011
    Date of Patent: March 31, 2015
    Assignee: Technische Universität Dresden
    Inventors: Lars Passauer, Falk Liebner, Klaus Fischer, Joachim Katzur
  • Substrate for Soil Improvement Having a Water-Storing Property, Method for Producing Same, and Use Thereof
    Publication number: 20120322990
    Abstract: The invention relates to a method for producing a lignin-based substrate for soil improvement having a water-storing property, characterized by the following steps: providing lignin, oxidizing the lignin in either an aqueous alkaline suspension or a pH-neutral aqueous suspension, the pH-neutral aqueous suspension being converted into an alkaline substance after the lignin has been oxidized, cross-linking the lignin in an aqueous alkaline medium using multifunctional compounds, and neutralizing, drying, and comminuting the lignin.
    Type: Application
    Filed: February 10, 2011
    Publication date: December 20, 2012
    Applicant: TECHNISCHE UNIVERSITAET DRESDEN
    Inventors: Lars Passauer, Falk Liebner, Klaus Fischer, Joachim Katzur