Patents by Inventor Jöran Stoldt

Jöran Stoldt 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 brominating organic compounds
    Patent number: 7271302
    Abstract: The present invention relates to processes for the bromination of organic compounds, and to bromination microreactors for carrying out these processes.
    Type: Grant
    Filed: September 19, 2000
    Date of Patent: September 18, 2007
    Assignee: Merck Patent Gesellschaft
    Inventors: Kai Fabian, Joeran Stoldt, Hanns Wurziger, Norbert Schwesinger
  • Reaction of carbonyl compounds with organometallic reagents
    Patent number: 7098344
    Abstract: A novel process for carrying out reactions of carbonyl compounds with organometallic reagents, in particular with Grignard reagents, is described.
    Type: Grant
    Filed: January 10, 2001
    Date of Patent: August 29, 2006
    Assignee: Merck Patent GmbH
    Inventors: Ulrich Koop, Holger Krummradt, Michael Schwarz, Joeran Stoldt, Juergen Eckstein, Stefan Zehner, Wolfgang Melichar
  • Method for the 1,3 dipolar cycloaddition of organic compounds in a microreactor
    Patent number: 7009059
    Abstract: The invention relates to a method for the 1,3 dipolar cycloaddition of organic compounds, characterized in that the reaction is carried out in a microreactor.
    Type: Grant
    Filed: March 6, 2001
    Date of Patent: March 7, 2006
    Assignee: Merck Patent GmbH
    Inventors: Hanns Wurziger, Joeran Stoldt, Guido Pieper, Norbert Schwesinger
  • Nitration in a static micromixer
    Patent number: 6861527
    Abstract: The present invention relates to a novel process for the nitration of organic compounds, preferably of aromatic and heteroaromatic compounds, using nitrating reagents which are known from the literature and new types of nitrating reagents.
    Type: Grant
    Filed: July 5, 2000
    Date of Patent: March 1, 2005
    Assignee: Merck Patent GmbH
    Inventors: Kai Fabian, Joeran Stoldt, Hanns Wurziger, Norbert Schwesinger
  • Method for oximating organic carbonyl compounds and/or ch-acid compounds
    Publication number: 20030163001
    Abstract: The invention relates to a method for oximating organic carbonyl compounds and/or CH-acid compounds, wherein at least one organic carbonyl compound and/or CH-acid compound in a liquid or dissolved form is mixed with at least one oximating agent in a liquid or dissolved form in at least one microreactor, is reacted during a residence time and the organic oxime thus formed is optionally isolated from the reaction mixture.
    Type: Application
    Filed: April 22, 2003
    Publication date: August 28, 2003
    Inventors: Hanns Wurziger, Joeran Stoldt, Guido Pieper, Norbert Schwesinger
  • Method for the 1,3 dipolar cycloaddition of organic compounds in a microreactor
    Publication number: 20030158421
    Abstract: The invention relates to a method for the 1,3 dipolar cycloaddition of organic compounds, characterised in that the reaction is carried out in a microreactor.
    Type: Application
    Filed: April 18, 2003
    Publication date: August 21, 2003
    Inventors: Hanns Wurziger, Joeran Stoldt, Guido Pieper, Norbert Schwesinger
  • Method for producing L-ascorbic acid
    Patent number: 6573393
    Abstract: The invention relates to a method for producing L-ascorbic acid from 2-keto-L-gulonic acid or 2,3-4,6-diacetone-2-keto-L-gulonic acid. The reaction is carried out in the presence of water and hydrogen halide and the concentration of the hydrogen halide in water is greater than 37 wt. %.
    Type: Grant
    Filed: August 6, 2001
    Date of Patent: June 3, 2003
    Assignee: Merck KGAA
    Inventors: Ulrich Fechtel, Wolfgang Heinz, Klaus Beschmann, Bernd Müller, Jöran Stoldt
  • Micro mixer
    Patent number: 6457855
    Abstract: A micro mixer for liquid, viscous or gaseous phases with two adjacent housing parts (1,2) disposed on a parting plane (3). Capillary tubes (7) forming line connections are inserted into cross holes (6) in the top part of the housing (1) by welding, for instance, and run into the parting plane (3). The other free ends of the capillary tubes (7) are bent apart and respectively bear a screw connection.
    Type: Grant
    Filed: May 26, 2000
    Date of Patent: October 1, 2002
    Assignee: Merck Patent Gesellschaft mit
    Inventors: Andreas Beirau, Michael Schmelz, Frank Schwarz, Jöran Stoldt
  • Housing for micromixers
    Patent number: 6367964
    Abstract: A housing for micromixers has two flat circular disk-shaped housing parts situated adjacent to each other in a parting plane. Each of the housing parts has a truncated cone surface on its peripheral edge. A multipart clamping ring which can be tightened in the peripheral direction encompasses the two housing parts and is adjacent to the truncated cone surfaces.
    Type: Grant
    Filed: May 26, 2000
    Date of Patent: April 9, 2002
    Assignee: Merck Patent GmbH
    Inventors: Michael Schmelz, Frank Schwarz, Jöran Stoldt