Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4962231 | Preparation of D- or L-alanine or high enantiomeric purity | Axel Paul, Peter Tonne, Hardo Siegel | 1990-10-09 |
| 4802965 | Concentrating aqueous solutions of organic compounds which contain salts, with simultaneous reduction of the salt content | Hermann Puetter | 1989-02-07 |
| 4753913 | Gas-phase alkylation of phenols, and a catalyst for this purpose | Hans-Heinrich Lenz, Karl Baer | 1988-06-28 |
| 4350791 | Vinylpyrrolidone polymers, their preparation, their use in the preparation of plasma substitutes, and the substitutes thus obtained | Ferdinand Straub, Siegfried Lang | 1982-09-21 |