Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4615852 | Method for producing nitrocellulose-based carbon black concentrates in the form of chips | Claus R. Engel | 1986-10-07 |
| 4197221 | Carbon black concentrate | Edith Eisenmenger, Gunther Fuchs, Lothar Rothbuhr, Hans Schafer | 1980-04-08 |