Issued Patents 1989
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886000 | Method of treating waste | Heinrich Igelbuscher, Heinrich Gresch, Heribert Dewert | 1989-12-12 |
| 4885011 | Cooling tower for the cooling water that drains/ from the condensor of a steam generator or the condensors/ of a plurality of steam generators | Sigurd Jorzyk, Gerhard Scholl, Heinrich Igelbuscher, Heinrich Gresch, Heribert Dewert | 1989-12-05 |
| 4882287 | Process for indicating the presence of toxic substances in air that is supplied to a personnel-occupied space | Heinrich Igelbuscher, Heinrich Gresch, Heribert Dewert, Hanns Rump | 1989-11-21 |
| 4875406 | Device for detecting different pollutants in gas streams | Heinrich Igelbuscher, Heinrich Gresch, Heribert Dewert, Peter Burggraf | 1989-10-24 |
| 4832936 | Process for making calcium sulfate dihydrate or gypsum | Georg R. U. Gebhard | 1989-05-23 |
| 4802573 | Process for wet quenching of coke | Heinrich Igelbuscher, Heinrich Gresch, Heribert Dewert | 1989-02-07 |