Patents by Inventor Wilhelm Schiemann

Wilhelm Schiemann 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 production of polyesters
    Patent number: 4339570
    Abstract: In the production of polyesters by introduction of precondensates on to a first plate of a column reactor product quality is improved and operating time is increased in that spontaneous flash evaporation of the precondensate takes place in a so-called entry box, before the introduction on to the first plate of the column reactor, and in that separation of the liquid component from the gaseous component is subsequently carried out by centrifugal force in a so-called annular chamber.
    Type: Grant
    Filed: June 15, 1981
    Date of Patent: July 13, 1982
    Assignee: Bayer Aktiengesellschaft
    Inventors: Edgar Muschelknautz, Roland Vogelsgesang, Helmut Ohse, Hans Westermann, Eckhard Moller, Klaus Hachmann, Wilhelm Schiemann, Bernt Kesper