Patents by Inventor Katharina BESSE

Katharina BESSE 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 and apparatus for color removal from PET-flake (shredded PET)
    Patent number: 9890261
    Abstract: Organic colorants incorporated in colored PET-flake, as being obtained by shredding PET bottles, can be extracted from the PET-flake by extracting the PET-flake with ethylene glycol (EG) at ambient pressure and at the boiling temperature of EG. Pre-treating of PET-flake in EG or other suitable organic compounds prior to extraction enhances the discoloration.
    Type: Grant
    Filed: September 23, 2015
    Date of Patent: February 13, 2018
    Assignee: OXXYNOVA GMBH
    Inventors: Katharina Besse, Thomas Rieckmann, Samantha Walter
  • Method and Apparatus for Color Removal from PET-flake (shredded PET)
    Publication number: 20160009893
    Abstract: Organic colorants incorporated in colored PET-flake, as being obtained by shredding PET bottles, can be extracted from the PET-flake by extracting the PET-flake with ethylene glycol (EG) at ambient pressure and at the boiling temperature of EG. Pre-treating of PET-flake in EG or other suitable organic compounds prior to extraction enhances the discoloration.
    Type: Application
    Filed: September 23, 2015
    Publication date: January 14, 2016
    Inventors: Katharina BESSE, Thomas RIECKMANN, Samantha WALTER