Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5104768 | Positive photoresist composition containing radiation sensitive quinonediazide compound and completely esterified polyamic acid polymer | Jörg Sassmannshausen, Ekkehard Bartmann | 1992-04-14 |
| 5077173 | Positive photoresist containing 2,3,4-trihydroxybenzophenone and 1,2-naphthoquinone-diazide-5-sulfonyl trisester of 1,3,5-trihydroxybenzene | Horst Munzel | 1991-12-31 |
| 4980268 | Negative photoresists of the polyimide type containing 1,2-disulfones | Ekkehard Bartmann, Rudolf Klug, Hartmut Hartner | 1990-12-25 |
| 4903617 | Process of removing the ash from the gas produced by the combustion of coal | Ekkehard Weber | 1990-02-27 |