Patents by Inventor Marcel Spahr

Marcel Spahr 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 device for producing biogas
    Patent number: 11312932
    Abstract: The invention relates to a method and a biogas plant for producing biogas, preferably from rice straw, wherein a substrate is fermented in two reactors (1, 2) in a circulating manner, so that a methane production from cellulose-and/or lignocellulose-containing substrate can be improved.
    Type: Grant
    Filed: January 29, 2018
    Date of Patent: April 26, 2022
    Assignee: Herbst Umwelttechnik GmbH
    Inventors: Marcel Spahr, Leonhard Fechter
  • METHOD AND DEVICE FOR PRODUCING BIOGAS
    Publication number: 20190382700
    Abstract: The invention relates to a method and a biogas plant for producing biogas, preferably from rice straw, wherein a substrate is fermented in two reactors (1, 2) in a circulating manner, so that a methane production from cellulose-and/or lignocellulose-containing substrate can be improved.
    Type: Application
    Filed: January 29, 2018
    Publication date: December 19, 2019
    Inventors: Marcel Spahr, Leonhard Fechter