Patents by Inventor Marcus Grunewald

Marcus Grunewald 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).

  • Patent number: 8338631
    Abstract: The present invention relates to a continuous process for preparing lower dialkyl carbonates as main product and alkylene glycol as by-product by catalyzed transesterification of a cyclic alkylene carbonate (e.g. ethylene carbonate or propylene carbonate) with lower alcohols, where the reaction of the alkylene carbonate is carried out with an alcohol containing dialkyl carbonate in countercurrent, characterized in that introduction of a stream containing at least 99.5% by weight of alcohol takes place below the point of introduction for the alcohol containing dialkyl carbonate in a particular spacing ratio between the abovementioned points of introduction.
    Type: Grant
    Filed: June 25, 2010
    Date of Patent: December 25, 2012
    Assignee: Bayer MaterialScience AG
    Inventors: Friedhelm Risse, Pieter Ooms, Andre Düx, Marcus Grünewald, Thomas Pancur, Arthur Susanto, Georg Ronge, Johan Vanden Eynde, Wim Wuytack
  • Patent number: 8079752
    Abstract: The invention relates to a mixer reactor of the rotor-stator type. This mixer reactor comprises a substantially rotationally symmetric housing which has a distributing chamber, a mixing chamber, a front plate that modifies the cross-section of the housing between these two chambers, and there are separate inlets into the mixing chamber for at least two substances and an outlet for removing the mixed material or product. The inlet for the first substance is provided in the axis of rotation of the mixing chamber. Two or more channels are aligned radially outward from this inlet, and the first substance is transported through these channels and into the mixing chamber. The inlet for the at least second substance is constructed in the form of a plurality of openings in the front plate, these inlet openings being are arranged rotationally symmetrically to the axis of rotation. Each of these inlet openings for the at least second substance has a corresponding pin which can be displaced in the axial direction.
    Type: Grant
    Filed: December 16, 2008
    Date of Patent: December 20, 2011
    Assignee: Bayer MaterialScience AG
    Inventors: Andreas Rausch, Christian Steffens, Dietmar Wastian, Manfred Keller-Killewald, Matthias Böhm, Joachim Ritter, Marcus Grünewald
  • Publication number: 20110040117
    Abstract: The present invention relates to a continuous process for preparing lower dialkyl carbonates as main product and alkylene glycol as by-product by catalyzed transesterification of a cyclic alkylene carbonate (e.g. ethylene carbonate or propylene carbonate) with lower alcohols, where the reaction of the alkylene carbonate is carried out with an alcohol containing dialkyl carbonate in countercurrent, characterized in that introduction of a stream containing at least 99.5% by weight of alcohol takes place below the point of introduction for the alcohol containing dialkyl carbonate in a particular spacing ratio between the abovementioned points of introduction.
    Type: Application
    Filed: June 25, 2010
    Publication date: February 17, 2011
    Applicant: Bayer MaterialScience AG
    Inventors: Friedhelm Risse, Pieter Ooms, Andre Duex, Marcus Grünewald, Thomas Pancur, Arthur Susanto, Georg Ronge, Johan Vanden Eynde, Wim Wuytack
  • Publication number: 20090175121
    Abstract: The invention relates to a mixer reactor of the rotor-stator type. This mixer reactor comprises a substantially rotationally symmetric housing which has a distributing chamber, a mixing chamber, a front plate that modifies the cross-section of the housing between these two chambers, and there are separate inlets into the mixing chamber for at least two substances and an outlet for removing the mixed material or product. The inlet for the first substance is provided in the axis of rotation of the mixing chamber. Two or more channels are aligned radially outward from this inlet, and the first substance is transported through these channels and into the mixing chamber. The inlet for the at least second substance is constructed in the form of a plurality of openings in the front plate, these inlet openings being are arranged rotationally symmetrically to the axis of rotation. Each of these inlet openings for the at least second substance has a corresponding pin which can be displaced in the axial direction.
    Type: Application
    Filed: December 16, 2008
    Publication date: July 9, 2009
    Inventors: Andreas Rausch, Christian Steffens, Dietmar Wastian, Manfred Keller-Killewald, Matthias Bohm, Joachim Ritter, Marcus Grunewald
  • Publication number: 20050087076
    Abstract: A cooking utensil, particularly for fat-free frying or cooking of food to be fried or cooked, comprises a floor and a wall, the floor having an elevated section for placing the food to be fried or cooked and a largely annular depression enclosing the elevated section. The elevated section has at least one groove. The elevated section is convexly curved and/or arched in such a way that frying fat or other liquids may drain into the depression on all sides. The groove allows the temporary return of frying fat or other liquids from the depression to the elevated section so that the wetting of the food to be fried or cooked occurs.
    Type: Application
    Filed: December 20, 2002
    Publication date: April 28, 2005
    Inventor: Marcus Grunewald