Patents by Inventor Rickard Drougge

Rickard Drougge 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 stabilizing lignin fiber for further conversion to carbon fiber
    Patent number: 11286582
    Abstract: A method for producing a stabilized lignin fiber from softwood alkaline lignin by heat treatment in the absence of oxidant is disclosed. The stabilized lignin fiber can be further treated to obtain carbon fiber.
    Type: Grant
    Filed: January 21, 2013
    Date of Patent: March 29, 2022
    Assignee: RISE INNVENTIA AB
    Inventors: Elisabeth Sjöholm, Göran Gellerstedt, Rickard Drougge, Ida Norberg
  • Method for producing a lignin fiber
    Patent number: 9446955
    Abstract: Disclosed is a method of producing a continuous lignin fiber from softwood and/or hardwood alkali lignin. The lignin fiber can be further treated to obtain structural carbon fiber.
    Type: Grant
    Filed: February 13, 2012
    Date of Patent: September 20, 2016
    Assignee: INNVENTIA AB
    Inventors: Elisabeth Sjholm, Goran Gellerstedt, Rickard Drougge, Ida Norberg, Ylva Nordstrom
  • METHOD FOR STABILIZING LIGNIN FIBER FOR FURTHER CONVERSION TO CARBON FIBER
    Publication number: 20140353861
    Abstract: A method for producing a stabilized lignin fiber from softwood alkaline lignin by heat treatment in the absence of oxidant is disclosed. The stabilized lignin fiber can be further treated to obtain carbon fiber.
    Type: Application
    Filed: January 21, 2013
    Publication date: December 4, 2014
    Inventors: Elisabeth Sjöholm, Göran Gellerstedt, Rickard Drougge, Ida Norberg
  • METHOD FOR PRODUCING A LIGNIN FIBER
    Publication number: 20140219909
    Abstract: Disclosed is a method of producing a continuous lignin fiber from softwood and/or hardwood alkali lignin. The lignin fiber can be further treated to obtain structural carbon fiber.
    Type: Application
    Filed: February 13, 2012
    Publication date: August 7, 2014
    Applicant: INNVENTIA AB
    Inventors: Elisabeth Sjoholm, Goran Gellerstedt, Rickard Drougge, Ida Norberg, Ylva Nordstrom