Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5206336 | Process for the preparation of naphthalenesulfonic acid/formaldehyde condensates having a low free formaldehyde content | Walter Lechner | 1993-04-27 |
| 5101007 | Process for the preparation of naphthalenesulfonic acid/formaldehyde condensates having a low free formaldehyde content | Walter Lechner | 1992-03-31 |