Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4616094 | Isolation of liquid urea from the off-gas of the synthesis of melamine | Klaus Borho, Ernst-Juergen Schier, Hans H. Schneehage, Alfred Widmann | 1986-10-07 |
| 4387224 | Melamine quality by reactivation of the melamine synthesis catalyst | Ernst-Juergen Schier, Hans H. Schneehage, Wolfgang Vodrazka | 1983-06-07 |