Patents by Inventor Hermann D. Fromm

Hermann D. Fromm 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 cooling melamine synthesis waste gases
    Patent number: 4138560
    Abstract: Melamine synthesis waste gases are first treated for the removal of melamine by condensation. The waste gases are then treated with urea-containing melts which are cooled indirectly. At least parts of said indirect cooling takes place together with the treatment of the reaction waste gases with the urea-containing melts in a single zone.
    Type: Grant
    Filed: December 27, 1977
    Date of Patent: February 6, 1979
    Assignee: BASF Aktiengesellschaft
    Inventors: Engelbert Hillenbrand, Hermann D. Fromm, Alfred Widmann