Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4332746 | Diphosphonodicarboxylic acid esters | Horst-Dieter Thamm, Volker Knittel, Werner Sommer | 1982-06-01 |
| 4300903 | Padding auxiliaries and processes for dyeing cellulose fibers or mixtures of cellulose fibers and synthetic fibers with sulphur dyestuffs, sulphur vat dyestuffs, vat dyestuffs and reactive dyestuffs | Friedrich Engelhardt, Karl-Heinz Keil, Klaus Sternberger | 1981-11-17 |
| 4260422 | Novel phosphonocarboxylic acid compounds | Horst-Dieter Thamm, Volker Knittel, Werner Sommer | 1981-04-07 |
| 4250296 | Levelling agent and process for the even dyeing of materials made of synthetic fibers | Hans J. Hauss, Karl Hintermeier, Friedrich Engelhardt | 1981-02-10 |