RU2291156C2 RU2001105392/04A RU2001105392A RU2291156C2 RU 2291156 C2 RU2291156 C2 RU 2291156C2 RU 2001105392/04 A RU2001105392/04 A RU 2001105392/04A RU 2001105392 A RU2001105392 A RU 2001105392A RU 2291156 C2 RU2291156 C2 RU 2291156C2 Authority RU Russia Prior art keywords cellulose derivative cellulose water less particles Prior art date …