| Patents for C08B 9 - Preparation of cellulose xanthate or viscose (204) | |
|---|---|
| 02/1978 | |
| 02/28/1978 | US4076934 Purging with nitrogen |
| 07/1977 | |
| 07/19/1977 | US4037039 Process for continuous xanthation and production of viscose spinning solution |
| 04/1977 | |
| 04/19/1977 | US4018681 Filtration of cellulosic solutions |
| 11/1976 | |
| 11/30/1976 | US3994950 Xanthate-Lewis acid complexes |