Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5171877 | Urethanes made from aliphatic fluoro alcohols, isocyanates and carboxylic acids, a process for their preparation and their use | Wolfgang Knaup, Rainer Kupfer, Rolf Kleber, Lothar Jaeckel | 1992-12-15 |
| 4474682 | Petroleum emulsion-breakers containing nitrogen, and their use | Siegfried Billenstein | 1984-10-02 |
| 4465817 | Modified etherified phenol/aldehyde condensation products and their use for breaking petroleum emulsions | Siegfried Billenstein, Martin Hille, Roland Bohm | 1984-08-14 |
| 4431565 | Surface-active compounds, a process for their preparation and their use | Siegfried Billenstein, Hildegard Freundl, Ignaz Wimmer, Johannes Macenka | 1984-02-14 |