Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4341709 | Preparation of .epsilon.-caprolactone | Willi Hofen, Herbert Klenk, Gerd Schreyer, Otto Weiberg, Helmut Waldmann +2 more | 1982-07-27 |
| 4293717 | Process for preparing aldehydes and diols | Helmut Waldmann, Wulf Schwerdtel | 1981-10-06 |
| 4284576 | Preparation of anthraquinone from tetrahydroanthraquinone | Norbert Schenk, Jorg Krekel, Paul Losacker | 1981-08-18 |
| 4214105 | Process for the hydroxylation of phenol | Hermann Seifert, Helmut Waldmann, Wulf Schwerdtel | 1980-07-22 |
| 4182917 | Process for the preparation of polyhydric phenols | Hermann Seifert, Helmut Waldmann, Wulf Schwerdtel | 1980-01-08 |
| 4182918 | Process for the preparation of polyhydric phenols | Hermann Seifert, Helmut Waldmann, Wulf Schwerdtel | 1980-01-08 |