Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4851011 | Process for the preparation of concentrated aqueous dye formulations of water-soluble organic dyes by membrane separation and with cross-flow micro-filtration to remove suspended or colloidal solids | Roger Lacroix, Roland Chåtelain | 1989-07-25 |
| 4838895 | Process for the preparation of concentrated aqueous dye formulations by desalination and concentration by membrane separation in presence of sodium salt | Roberto Galli | 1989-06-13 |