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 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
  • Reaction of carbonyl compounds with organometallic reagents
    Publication number: 20030004357
    Abstract: The invention relates to a novel method for carrying out reactions of carbonyl compounds with organometallic reagents, especially grignard reagents. The inventive method is characterised in that the organometallic reagent and the carbonyl compound are provided and tempered separately in a suitable solvent before being pumped into a tempered mini/micromixer.
    Type: Application
    Filed: July 3, 2002
    Publication date: January 2, 2003
    Inventors: Ulrich Koop, Holger Krummradt, Michael Schwarz, Joran Stoldt, Jurgen Eckstein, Stefan Zehner, Wolfgang Melichar
  • 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