Patents by Inventor Dirk Mueller

Dirk Mueller 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).

  • Process for the preparation of macrocyclic esters
    Patent number: 6458972
    Abstract: Macrocyclic ester compounds can be prepared from oligoesters by thermal cleavage in the presence of a thermostable benzene derivative.
    Type: Grant
    Filed: August 21, 2001
    Date of Patent: October 1, 2002
    Assignee: Haarmann & Reimer GmbH
    Inventors: Horst Surburg, Dirk Müller, Stephan Klein, Christine Mendoza-Frohn, Georg Ronge, Kai Verkerk
  • Production of activated carbon from polymers with aromatic nuclei
    Patent number: 6300466
    Abstract: Proposed is a process for the production of activated carbon, in which the characteristics of the activated carbon are specifically controllable by way of adjustment of the parameters of the process.
    Type: Grant
    Filed: May 9, 2000
    Date of Patent: October 9, 2001
    Assignee: Helsa-Werke Helmut Sandler GmbH & Co. KG
    Inventors: Wolfgang Heschel, Dirk Müller
  • Device for separating sheets in a pile
    Patent number: 6267372
    Abstract: The apparatus has an input pocket into which a stack of sheets is inserted. At least the sheet to be picked from the stack by the picking device is transported by means of a feed device to a picking device which then picks one sheet from the stack at a time. To improve singling quality, a presingling device is provided which first transports only part of the stack to the picking device. In order to ensure that stacks of different-sized sheet material are singled reliably, an aligning device is provided which transports at least the sheet to be picked from the stack in the direction of a defined stop and thus aligns the sheet against said stop. The aligning device preferably cooperates alternatingly with the feed device. To increase singling reliability, a pressure plate is provided in the presingling device for acting upon the presingled partial stack with a certain pressure.
    Type: Grant
    Filed: August 30, 1999
    Date of Patent: July 31, 2001
    Assignee: Giesecke & Devrient GmbH
    Inventors: Ulrich Mylaeus, Kurt Schübel, Dirk Müller