Patents by Inventor Yi-ru Chen-Sarkanen

Yi-ru Chen-Sarkanen 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).

  • Publication number: 20210054211
    Abstract: A composition may include at least 50 wt-% of a first lignin component; and up to 50 wt % of a second lignin component. The first and second lignin components may include processed lignin or native lignin. The composition may include at least 80 wt-% processed lignin; and at least 1 wt-%) of a blend component comprising an aromatic ring and one or more electron withdrawing groups. The processed lignin may include kraft lignin or GVL lignin or both. The composition may include a lignin component and a non-lignin blend component. Polymeric articles formed from the composition by casting, molding, or extrusion may exhibit a tensile strength of 20 MPa or greater, or a tensile elongation at break of 1.5%> or greater.
    Type: Application
    Filed: March 21, 2019
    Publication date: February 25, 2021
    Inventors: Simo Sarkanen, Yi-ru Chen-Sarkanen
  • Patent number: 10119027
    Abstract: Disclosed herein are compositions that include at least about 75 weight percent (wt %) alkylated lignin based on the total weight of the composition without any solvent(s). The material having a tensile strength of at least about 35 MPa, an elongation-to-break of at least about 1.5%, or both. Articles including such materials and methods of forming the same are also disclosed.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: November 6, 2018
    Assignee: REGENTS OF THE UNIVERSITY OF MINNESOTA
    Inventors: Yi-ru Chen-Sarkanen, Simo Sarkanen, Yun-Yan Wang
  • Patent number: 9796993
    Abstract: A method involving degrading materials that include lignin generally includes contacting a lignin sample with a flavin-dependent monooxygenase and contacting the lignin sample with an auxiliary compound.
    Type: Grant
    Filed: December 12, 2012
    Date of Patent: October 24, 2017
    Assignee: REGENTS OF THE UNIVERSITY OF MINNESOTA
    Inventors: Yi-ru Chen-Sarkanen, Simo Sarkanen, Yun-Yan Wang
  • Publication number: 20170166749
    Abstract: Disclosed herein are compositions that include at least about 75 weight percent (wt %) alkylated lignin based on the total weight of the composition without any solvent(s). The material having a tensile strength of at least about 35 MPa, an elongation-to-break of at least about 1.5%, or both. Articles including such materials and methods of forming the same are also disclosed.
    Type: Application
    Filed: March 13, 2015
    Publication date: June 15, 2017
    Applicant: REGENTS OF THE UNIVERSITY OF MINNESOTA
    Inventors: Yi-ru Chen-Sarkanen, Simo Sarkanen, Yun-Yan Wang
  • Publication number: 20140335571
    Abstract: Disclosed herein are methods that involve degrading materials that include lignin. In one aspect, the method generally includes contacting a lignin sample with a lignin depolymerase and contacting the lignin sample with an auxiliary compound. In another aspect, the method generally includes contacting an auxiliary compound with a sample that includes uncleaved lignin macromolecules and at least partially cleaved lignin components in intermolecular association with other lignin components and/or at least a portion of the uncleaved lignin macromolecules. In both aspects, the auxiliary compound dissociates at least partially cleaved lignin components from one another and/or the uncleaved lignin macromolecules.
    Type: Application
    Filed: December 12, 2012
    Publication date: November 13, 2014
    Inventors: Yi-ru Chen-Sarkanen, Simo Sarkanen, Yun-Yan Wang