Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5846382 | Process for enhancing the whiteness, brightness and chromaticity of fillers and pigments | — | 1998-12-08 |
| 5482514 | Process for enhancing the whiteness, brightness and chormaticity of paper making fibres | — | 1996-01-09 |
| 5039377 | Bleaching paper pulp with modified silicate ion exchanger and hydrogen peroxide | Josef Weigl, Friedrich Ruf, Herbert E. Mayer | 1991-08-13 |
| 4486216 | Method for the processing of fecal waste | Hans Buckl, Ulrich Kroner | 1984-12-04 |