Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5019624 | Polyvinyl acetals and their use | Matthias Gutweiler, Ernst I. Leupold | 1991-05-28 |
| 4986885 | Process for the separation of butanol and butoxyacetaldehyde | Ingo Leupold, Karl-Heinz Schonwalder | 1991-01-22 |
| 4968833 | Process for the preparation of a glyoxylic acid ester | Ernst I. Leupold, Wolfgang Ebertz, Friedrich Wunder | 1990-11-06 |
| 4814491 | Hemiacetals of glyoxylic esters and a process for the isolation of glyoxylic esters | Ernst I. Leupold, Joachim Schutz | 1989-03-21 |
| 4692547 | Process for the preparation of glyoxylic hemiacetal esters | Ernst I. Leupold, Wolfgang Ebertz | 1987-09-08 |