Patents by Inventor Gunther Rauchschwalbe

Gunther Rauchschwalbe 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 isolation of pure dinitrotoluenes
    Patent number: 5149890
    Abstract: Pure or substantially enriched 2,4- and 2,6-dinitrotoluene can be isolated from a mixture containing these isomers if such a mixture is distilled under a pressure of 0.5 to 20 mbar at a temperature of 80.degree. to 200.degree. C. with exclusion of reducing conditions.
    Type: Grant
    Filed: November 1, 1991
    Date of Patent: September 22, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Gunther Rauchschwalbe, Heinz-Ulrich Blank, Ludwig Deibele, Kaspar Hallenberger, Gerhard Ruffert