Patents by Inventor Patrick Stier

Patrick Stier 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).

  • Fermentation process for production of acetone, butanol and ethanol using isophoron as absorbent
    Patent number: 8945891
    Abstract: The invention relates to a method for producing a low-molecular-weight organic compound, such as acetone, butanol, and ethanol, in a fermentation process. The method contains a step of introducing a gas flow into an aqueous solution containing microorganisms producing the low-molecular-weight organic compound; a step of recovering the gas flow through a compound comprising isophoron; and optionally a step of separating the low-molecular-weight organic compound from the composition comprising isophoron.
    Type: Grant
    Filed: June 13, 2012
    Date of Patent: February 3, 2015
    Assignee: Evonik Degussa GmbH
    Inventors: Joerg-Joachim Nitz, Gerda Grund, Franz Ulrich Becker, Patrick Stier
  • ABE FERMENTATION METHOD COMPRISING PRODUCT ABSORPTION THROUGH ISOPHORON
    Publication number: 20140113341
    Abstract: The invention relates to a method comprising the following method steps: A) providing an aqueous solution comprising microorganisms producing low-molecular, organic compounds; B) introducing at least one gas or gas mixture into the aqueous solution; C) recovering the gas flow through a compound comprising an isophoron; and optionally D) separating the low-molecular, organic compound from the composition comprising the isophoron.
    Type: Application
    Filed: June 13, 2012
    Publication date: April 24, 2014
    Applicant: Evonik Degussa GmbH
    Inventors: Joerg-Joachim Nitz, Gerda Grund, Franz Ulrich Becker, Patrick Stier