Patents by Inventor Markus Held

Markus Held 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 preparing methionine
    Patent number: 10899706
    Abstract: The present invention relates to a method for preparing methionine or methionine salts. In particular, the invention describes the step of preparing 2-hydroxy-4-(methylthio)butyronitrile (MMP-CN) from 3-methylthiopropanal (MMP) and hydrogen cyanide (HCN) in the presence of ammonia by bringing a gaseous mixture comprising HCN and ammonia into contact with MMP.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: January 26, 2021
    Assignee: Evonik Operations GmbH
    Inventors: Judith Hierold, Daniel Sudhoff, Martin Steurenthaler, Hans Joachim Hasselbach, Philipp Roth, Thorsten Merker, Markus Held, Daniel Fischer, Christian Kaiser
  • METHOD FOR PREPARING METHIONINE
    Publication number: 20200115334
    Abstract: The present invention relates to a method for preparing methionine or methionine salts. In particular, the invention describes the step of preparing 2-hydroxy-4-(methylthio)butyronitrile (MMP-CN) from 3-methylthiopropanal (MMP) and hydrogen cyanide (HCN) in the presence of ammonia by bringing a gaseous mixture comprising HCN and ammonia into contact with MMP.
    Type: Application
    Filed: December 15, 2017
    Publication date: April 16, 2020
    Applicant: Evonik Degussa GmbH
    Inventors: Judith HIEROLD, Daniel SUDHOFF, Martin STEURENTHALER, Hans Joachim HASSELBACH, Philipp ROTH, Thorsten MERKER, Markus HELD, Daniel FISCHER, Christian KAISER
  • Method for determining dimethyl disulphide
    Patent number: 10422778
    Abstract: A method for determining dimethyl disulphide proceeds by carrying out a chromatographic separation of an analyte containing at least dimethyl disulphide and methanesulphonic acid, and determining the dimethyl disulphide by pulsed amperometric detection.
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: September 24, 2019
    Assignee: Evonik Degussa GmbH
    Inventors: Harald Jakob, Benjamin Fonfe, Sebastian Fuss, Andreas Doerflein, Markus Held, Nadine Duerr
  • METHOD FOR DETERMINING DIMETHYL DISULPHIDE
    Publication number: 20180267002
    Abstract: A method for determining dimethyl disulphide proceeds by carrying out a chromatographic separation of an analyte containing at least dimethyl disulphide and methanesulphonic acid, and determining the dimethyl disulphide by pulsed amperometric detection.
    Type: Application
    Filed: December 17, 2015
    Publication date: September 20, 2018
    Applicant: Evonik Degussa GmbH
    Inventors: Harald JAKOB, Benjamin Fonfe, Sebastian Fuss, Andreas Doerflein, Markus Held, Nadine Duerr