Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5434225 | Amine-unsaturated epoxidized polysulfide addition products | Ulrich Grundke, Bert Meier, Jurgen Zehrfeld | 1995-07-18 |
| 5071951 | Epoxy hardening agents | Grundke Ulrich, Achim Hansen, Rolf Herzog | 1991-12-10 |
| 5034495 | Novel hardening agents | Achim Hansen, Jurgen Zehrfeld | 1991-07-23 |
| 5032629 | Epoxy hardening agents | Achim Hansen, Jurgen Zehrfeld | 1991-07-16 |