Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883730 | Method for manufacturing heat-stable structured layers based on expoxy resin | Winfried Plundrich | 1989-11-28 |
| 4849051 | Heat resistant positive resists and method for preparing heat-resistant relief structures | Albert Hammerschmidt | 1989-07-18 |
| 4828948 | Method for the production of heat-resistant structured layers | Winfried Plundrich | 1989-05-09 |
| 4801681 | Method for the manufacture of polyimidazole and polyimidazo-pyrrolone precursors from tetra carboxylic acid moiety reactant | — | 1989-01-31 |