Patents by Inventor Wilhelm Poschinger

Wilhelm Poschinger 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 of preparing melamine from cyanamide and/or dicyandiamide
    Patent number: 4069383
    Abstract: Melamine is prepared from cyanamide and/or dicyandiamide by contacting the cyanamide and/or dicyandiamide at approximately atmospheric pressure in an organic solvent at 100.degree. to 250.degree. C with at least one solvent selected from the group having the formulas ##STR1## wherein R.sub.1 and R.sub.2 are alkyl which may be joined together to form an alkylene ring,In the simultaneous presence of alkali hydroxide or alkaline earth hydroxide.
    Type: Grant
    Filed: August 17, 1976
    Date of Patent: January 17, 1978
    Assignee: Suddeutsche Kalkstickstoff-Werke Aktiengesellschaft
    Inventors: Horst Michaud, Gunter Ortenburger, Wilhelm Poschinger, Heinrich Rock, Josef Seeholzer