Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4299654 | Process for producing sized paper and cardboard with polyelectrolytes and epoxide-amine-polyamide reaction products | Klaus-Dieter Leifels, Werner Mischler | 1981-11-10 |
| 4200489 | Process for producing sized paper or cardboard with dyes or optical brighteners and epoxide-amine-polyamide reaction products | Klaus-Dieter Leifels, Werner Mischler | 1980-04-29 |