Patents by Inventor Lars Elfving

Lars Elfving 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).

  • Pre-treatment of cellulosic material
    Patent number: 9528129
    Abstract: A method of pre-treating a cellulosic material before hydrolysis is provided. The method comprises the steps of: impregnating the cellulosic material with a reactive water-soluble gas, such as sulphur dioxide (SO2) or carbon dioxide (CO2), in an impregnation chamber to obtain impregnated material; and heating the impregnated material to obtain pre-treated material, wherein the cellulosic material is compressed right before or when it is transferred to the impregnation chamber. A corresponding system is also provided.
    Type: Grant
    Filed: April 29, 2014
    Date of Patent: December 27, 2016
    Assignee: Sekab E-Technology AB
    Inventors: Torbjorn Van Der Meulen, Stanley Forss, Lars Elfving, Staffan Magnusson, Magnus Hagglund, Anders Sjoblom
  • Pre-Treatment of Cellulosic Material
    Publication number: 20140295509
    Abstract: A method of pre-treating a cellulosic material before hydrolysis is provided. The method comprises the steps of: impregnating the cellulosic material with a reactive water-soluble gas, such as sulphur dioxide (SO2) or carbon dioxide (CO2), in an impregnation chamber to obtain impregnated material; and heating the impregnated material to obtain pre-treated material, wherein the cellulosic material is compressed right before or when it is transferred to the impregnation chamber. A corresponding system is also provided.
    Type: Application
    Filed: April 29, 2014
    Publication date: October 2, 2014
    Applicant: Sekab E-Technology AB
    Inventors: Torbjorn Van Der Meulen, Stanley Forss, Lars Elfving, Staffan Magnusson, Magnus Hagglund, Anders Sjoblom
  • Pre-treatment of cellulosic material
    Patent number: 8834633
    Abstract: A method of pre-treating a cellulosic material before hydrolysis is provided. The method comprises the steps of: impregnating the cellulosic material with a reactive water-soluble gas, such as sulphur dioxide (SO2) or carbon dioxide (CO2), in an impregnation chamber to obtain impregnated material; and heating the impregnated material to obtain pre-treated material, wherein the cellulosic material is compressed right before or when it is transferred to the impregnation chamber. A corresponding system is also provided.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: September 16, 2014
    Assignee: Sekab E-Technology AB
    Inventors: Torbjörn Van Der Meulen, Stanley Forss, Lars Elfving, Staffan Magnusson, Magnus Hägglund, Anders Sjöblom
  • Pre-Treatment of Cellulosic Material
    Publication number: 20130143289
    Abstract: A method of pre-treating a cellulosic material before hydrolysis is provided. The method comprises the steps of: impregnating the cellulosic material with a reactive water-soluble gas, such as sulphur dioxide (SO2) or carbon dioxide (CO2), in an impregnation chamber to obtain impregnated material; and heating the impregnated material to obtain pre-treated material, wherein the cellulosic material is compressed right before or when it is transferred to the impregnation chamber. A corresponding system is also provided.
    Type: Application
    Filed: December 17, 2010
    Publication date: June 6, 2013
    Inventors: Torbjörn Van Der Meulen, Stanley Forss, Lars Elfving, Staffan Magnusson, Magnus Hägglund, Anders Sjöblom