Patents by Inventor Joerg TILLACK

Joerg TILLACK 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 aliphatic oligocarbonate diols
    Patent number: 6833433
    Abstract: A process for the production of aliphatic oligocarbonate diols is disclosed. The optionally catalyzed high yield process entails the multistage transesterification of aliphatic diols with dimethyl carbonate. In the process DMC-methanol mixtures that have been distilled off are recycled to the reaction solution with further conversion and depletion of the contained DMC in the same or in a following reaction batch.
    Type: Grant
    Filed: December 4, 2002
    Date of Patent: December 21, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Andreas Schlemenat, Jörg Tillack, Jörg Laue, Herbert Witossek
  • Process for producing aliphatic oligocarbonate diols
    Patent number: 6818784
    Abstract: The present invention relates to a process for producing an aliphatic oligocarbonate diol comprising a) reacting an aliphatic diol with dimethyl carbonate at an elevated pressure in a reaction mixture, and b) subsequently removing unreacted methanol and dimethyl carbonate under a reduced pressure to uncap the terminal OH groups.
    Type: Grant
    Filed: June 26, 2002
    Date of Patent: November 16, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Jörg Tillack, Jörg Laue, Herbert Witossek, Andreas Schlemenat