Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889633 | Process for treating aqueous fluids containing organic compounds and salts of polyvalent inorganic acids | — | 1989-12-26 |
| 4810390 | Separation and purification of pigment suspensions and suspensions of pigment intermediates by a membrane separation process | Klaus Flierl, Hans-Rudolf Marfurt | 1989-03-07 |