Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4302582 | Process for the preparation of a condensation product from phenothiazine and p-nitrosophenol | Gert Nagl, Joachim Ribka, Heinz Dickmanns | 1981-11-24 |
| 4218219 | Condensation product from phenothiazine and p-nitrosophenol, process for the production of the condensation product, process for the production of sulfur dyestuffs using the condensation product and the sulfur dyestuffs prepared therewith | Gert Nagl, Joachim Ribka, Heinz Dickmanns | 1980-08-19 |