Patents by Inventor Andreas Jürgen Wego

Andreas Jürgen Wego 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).

  • Process for making polyacrylonitrile fibers
    Patent number: 11248314
    Abstract: A process is disclosed herein comprising the steps: a) contacting an esterifying agent and a polysaccharide in the presence of a first solvent and suitable reaction conditions for a reaction time sufficient to form a product comprising a polysaccharide ester composition, the polysaccharide ester composition comprising a polysaccharide ester having a degree of substitution of about 0.001 to about 3; wherein the esterifying agent comprises an acyl halide, a phosphoryl halide, a carboxylic acid anhydride, a haloformic acid ester, a carbonic acid ester, or a vinyl ester; and the ratio of esterifying agent to polysaccharide is in the range of about 0.001:1 to about 3:1 on a molar equivalent basis; b) combining the product obtained in step a) with polyacrylonitrile; and c) spinning fibers.
    Type: Grant
    Filed: November 20, 2017
    Date of Patent: February 15, 2022
    Assignee: NUTRITION & BIOSCIENCES USA 4, INC.
    Inventors: Douglas J. Adelman, Natnael Behabtu, Alicia C. Briegel, Ross S. Johnson, Christian Peter Lenges, Kathleen Opper, Andreas Jürgen Wego, Christian Herbert
  • PROCESS FOR MAKING POLYACRYLONITRILE FIBERS
    Publication number: 20190345642
    Abstract: A process is disclosed herein comprising the steps: a) contacting an esterifying agent and a polysaccharide in the presence of a first solvent and suitable reaction conditions for a reaction time sufficient to form a product comprising a polysaccharide ester composition, the polysaccharide ester composition comprising a polysaccharide ester having a degree of substitution of about 0.001 to about 3; wherein the esterifying agent comprises an acyl halide, a phosphoryl halide, a carboxylic acid anhydride, a haloformic acid ester, a carbonic acid ester, or a vinyl ester; and the ratio of esterifying agent to polysaccharide is in the range of about 0.001:1 to about 3:1 on a molar equivalent basis; b) combining the product obtained in step a) with polyacrylonitrile; and c) spinning fibers.
    Type: Application
    Filed: November 20, 2017
    Publication date: November 14, 2019
    Inventors: Douglas J. Adelman, Natnael Behabtu, Alicia C. Briegel, Ross S. Johnson, Christian Peter Lenges, Kathleen Opper, Andreas Jürgen Wego, Christian Herbert