Patents by Inventor Jonas Engström

Jonas Engström 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 AND A SPINNING LINE UNIT FOR WET SPINNING OF CELLULOSE FIBERS FROM AN ALKALINE SPIN BATH
    Publication number: 20250051969
    Abstract: A process for forming a fiber tow, involves a wet spinning procedure comprising: dissolving cellulose pulp in an alkaline aqueous solvent to form a cellulose spin dope composition; spinning the cellulose spin dope composition in a coagulation bath having a pH of more than 7.0, preferably a pH of at least 10, to produce a fiber tow; and passing the produced fiber tow through a sequence of consecutive stretching and washing steps in which the formed fiber tow is washed with a washing liquid by a counter-current flow washing procedure.
    Type: Application
    Filed: October 31, 2024
    Publication date: February 13, 2025
    Inventors: Bengt HAGSTRÖM, Tobias KÖHNKE, Jonas ENGSTRÖM
  • Process for wet spinning of cellulose fibers from an alkaline spin bath
    Patent number: 12188157
    Abstract: A process for forming a fiber tow, involves a wet spinning procedure comprising the steps of: dissolving cellulose pulp N in an alkaline aqueous solvent to form a cellulose spin dope composition, spinning the cellulose spin dope composition in a coagulation having a p H of more than 7.0, preferably a pH of at least 10, to produce a fiber tow, and passing the produced fiber tow through a sequence of consecutive stretching and washing steps in which the formed fiber tow is washed with a washing liquid by a counter-current flow washing procedure.
    Type: Grant
    Filed: February 20, 2020
    Date of Patent: January 7, 2025
    Assignee: TREETOTEXTILE AB
    Inventors: Bengt Hagström, Tobias Köhnke, Jonas Engström
  • A PROCESS AND A SPINNING LINE UNIT FOR WET SPINNING OF CELLULOSE FIBERS FROM AN ALKALINE SPIN BATH
    Publication number: 20220112628
    Abstract: A process for forming a fiber tow, involves a wet spinning procedure comprising the steps of: dissolving cellulose pulp N in an alkaline aqueous solvent to form a cellulose spin dope composition, spinning the cellulose spin dope composition in a coagulation having a p H of more than 7.0, preferably a pH of at least 10, to produce a fiber tow, and passing the produced fiber tow through a sequence of consecutive stretching and washing steps in which the formed fiber tow is washed with a washing liquid by a counter-current flow washing procedure.
    Type: Application
    Filed: February 20, 2020
    Publication date: April 14, 2022
    Inventors: Bengt Hagström, Tobias Köhnke, Jonas Engström