Patents by Inventor Vinod KN

Vinod KN 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).

  • Sustainable polyester from recycled polyethylene terephthalate
    Patent number: 12570827
    Abstract: A method includes depolymerizing post-consumer or post-industrial recycled polyethylene terephthalate (rPET) to form bis(2-hydroxyethyl) terephthalate (BHET), and reacting at least a portion of the BHET with a catalyst to form an alcohol. The alcohol includes cyclohexanedimethanol (CHDM) or 1,4-phenylenedimethanol (PDM). Further steps of the method include polymerizing the alcohol in the presence of additional BHET to form a polyester. The polyester may include poly(cyclohexylenedimethylene terephthalate (PCT), polyethylene terephthalate glycol (PETG) copolyester, polycyclohexylene dimethylene terephthalate glycol (PCTG) copolyester, polycyclohexylene dimethylene terephthalate acid (PCTA), or a monomer having repeating units with the structure (I), wherein n is an integer having a value of at least 20.
    Type: Grant
    Filed: May 11, 2021
    Date of Patent: March 10, 2026
    Assignee: SHPP Global Technologies B.V.
    Inventors: Lohith Kenchaiah, Peter Vollenberg, Kaushal Gandhi, Ranjith Choorikkat, Vinod KN
  • Sustainable Polyester from Recycled Polyethylene Terephthalate
    Publication number: 20230174738
    Abstract: A method includes depolymerizing post-consumer or post-industrial recycled polyethylene terephthalate (rPET) to form bis(2-hydroxyethyl) terephthalate (BHET), and reacting at least a portion of the BHET with a catalyst to form an alcohol. The alcohol includes cyclohexanedimethanol (CHDM) or 1,4-phenylenedimethanol (PDM). Further steps of the method include polymerizing the alcohol in the presence of additional BHET to form a polyester. The polyester may include poly(cyclohexylenedimethylene terephthalate (PCT), polyethylene terephthalate glycol (PETG) copolyester, polycyclohexylene dimethylene terephthalate glycol (PCTG) copolyester, polycyclohexylene dimethylene terephthalate acid (PCTA), or a monomer having repeating units with the structure (I), wherein n is an integer having a value of at least 20.
    Type: Application
    Filed: May 11, 2021
    Publication date: June 8, 2023
    Inventors: Lohith Kenchaiah, Peter Vollenberg, Kaushal Gandhi, Ranjith CHOORIKKAT, Vinod KN