Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6380299 | Stable aqueous dispersions for sizing paper | Kurt F. Fischer, Johannes Fallmann | 2002-04-30 |
| 5759259 | Air entraining agent for concrete and mortar mixtures | Harald Karl Steindl | 1998-06-02 |
| 5378799 | Heat-stable polyimides and polyamide-imides with modified benzhydrol structural elements and their preparation | Gerhard Greber, Heinrich Gruber | 1995-01-03 |
| 5164476 | Soluble and/or fusible polyimides and polyamidoimides | Gerd Greber, Heinrich Gruber | 1992-11-17 |
| 5126462 | Sulfur-containing aromatic tetracarboxylic acids and derivatives thereof | Gerd Greber, Heinrich Gruber | 1992-06-30 |