Paper making and fiber liberation
Patent class list (only not empty are listed)
Deeper subclasses:
Class / Patent application number | Description | Number of patent applications / Date published |
---|---|---|
162100000 | PROCESSES AND PRODUCTS | 1373 |
162001000 | PROCESSES OF CHEMICAL LIBERATION, RECOVERY OR PURIFICATION OF NATURAL CELLULOSE OR FIBROUS MATERIAL | 561 |
162232000 | APPARATUS | 409 |