Patents by Inventor Juergen Ick

Juergen Ick 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 making a polyamine
    Patent number: 4189443
    Abstract: A process is provided for making an aromatic polyamine by condensing an aromatic amine with formaldehyde wherein the reaction mixture is maintained at a boiling temperature under reflux and formaldehyde is mixed with the stream of condensed vapors returning to the reactor from the reflux condenser. The process produces a diphenylmethane polyamine particularly well suited for phosgenation to form the corresponding polyisocyanate.
    Type: Grant
    Filed: April 26, 1974
    Date of Patent: February 19, 1980
    Assignee: Bayer Aktiengesellschaft
    Inventors: Willi Eifler, Juergen Ick