Patents by Inventor Johannes Reiffer

Johannes Reiffer 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 continuous hot phosgenation of amines
    Patent number: 4549991
    Abstract: This invention relates to a process for the production of organic isocyanates by the continous hot phosgenation of amines, whereby the solids are retained in the reactor by an appropriate separator and the isocyanate formed during the reaction is constantly removed from the reactor. Preferably the amount of solids of the suspension in the reactor is set so that the amount of the isocyanate taken off per unit of time reaches a maximum.
    Type: Grant
    Filed: October 11, 1983
    Date of Patent: October 29, 1985
    Assignee: Chemische Werke Huls Aktiengesellschaft
    Inventors: Josef Disteldorf, Werner Hubel, Johannes Reiffer