Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5037512 | Process for the purification of benzoic acid by distillation with an amine | — | 1991-08-06 |
| 4506103 | Process for the preparation of o-benzylphenol | Heinz-Peter Hemmerich, Heinz Dohm | 1985-03-19 |
| 4268458 | Process for the preparation of N-alkylated aromatic amines | Heinz-Peter Hemmerich | 1981-05-19 |
| 4261918 | Process for the preparation of chloroformic acid methyl ester | Erhard Schellmann, Jurgen Lahrs | 1981-04-14 |