Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6617463 | Method for the production of L-ascorbic acid by lactonization of 2-keto-L-gulonic acid or s2-keto-L-gulonate esters | Andreas Böttcher | 2003-09-09 |
| 6573400 | Preparation of 2-keto-L-gulonic esters | Andreas Böttcher | 2003-06-03 |
| 6554965 | Rectification column for isolating pure substances from high boiling air-and/or temperature sensitive substances | Horst Hartmann, Wulf Kaiser, Harald Laas, Paul Grafen, Bernhard Bockstiegel +1 more | 2003-04-29 |