Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7976676 | Process of bleaching softwood pulps in a D1 or D2 stage in a presence of a weak base | Caifang Yin | 2011-07-12 |
| 7976677 | Process of bleaching hardwood pulps in a D1 or D2 stage in a presence of a weak base | Caifang Yin | 2011-07-12 |