Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8420737 | Method for the production of co-extrudates composed of polystyrene and of a crosslinked polyvinylpyrrolidone with reduced residual styrene monomer content | Helmut Meffert, Marianna Pierobon, Hermann Josef Feise, Robert Bayer | 2013-04-16 |
| 8394279 | Method for regenerating a filter aid | Helmut Meffert, Marianna Pierobon, Tobias Petsch, Julia Brodersen, Hermann Josef Feise +4 more | 2013-03-12 |
| 7993533 | Method for regenerating an auxiliary filtering agent | Helmut Meffert, Marianna Pierobon, Tobias Petsch, Julia Brodersen, Hermann Josef Feise +3 more | 2011-08-09 |