Patents by Inventor Anja Bierstedt

Anja Bierstedt 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 preparation of acetoacetylated polyols
    Patent number: 11802104
    Abstract: The invention discloses a method for preparation of an acetoacetylated polyol by reaction of a polyol with deketene in the presence of a base and in the absence of a solvent.
    Type: Grant
    Filed: April 3, 2020
    Date of Patent: October 31, 2023
    Assignee: ARXADA AG
    Inventors: Masaki Nakajima, Anja Bierstedt, Leo Schmid, Maximilian Kuehnle, Ulrich Mayerhoeffer, Ellen Klegraf
  • Method for preparation of decolorized acetoacetylated glycerol with activated carbon
    Patent number: 11384047
    Abstract: The invention discloses the use of activated carbon with a mesh size smaller than 80 for the decolorization of acetoacetylated glycerol.
    Type: Grant
    Filed: April 6, 2020
    Date of Patent: July 12, 2022
    Assignee: ARXADA AG
    Inventors: Leo Schmid, Anja Bierstedt
  • Method for Preparation of Acetoacetylated Polyols
    Publication number: 20220185762
    Abstract: The invention discloses a method for preparation of an acetoacetylated polyol by reaction of a polyol with deketene in the presence of a base and in the absence of a solvent.
    Type: Application
    Filed: April 3, 2020
    Publication date: June 16, 2022
    Inventors: Masaki Nakajima, Anja Bierstedt, Leo Schmid, Maximilian Kuehnle, Ulrich Mayerhoeffer, Ellen Klegraf
  • Method for Preparation of Decolorized Acetoacetylated Glycerol with Activated Carbon
    Publication number: 20220089519
    Abstract: The invention discloses the use of activated carbon with a mesh size smaller than 80 for the decolorization of acetoacetylated glycerol.
    Type: Application
    Filed: April 6, 2020
    Publication date: March 24, 2022
    Inventors: Leo Schmid, Anja Bierstedt