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Subject 

1. Paper-Making  (32)
2. Production Of Cellulose  (32)
3. Textiles  (32)
4. Production Of Cellulose By Removing Non-Cellulose Substancesfrom Cellulose-Containing Materials  (30)
5. Apparatus Therefor  (30)
6. Regeneration Of Pulping Liquors  (30)
7. Preparation Thereof Not Covered By Subclasses D21c Or D21d  (16)
8. Paper Not Otherwise Provided For  (16)
9. Treatment Of Finished Paper Not Covered By Class B31 Or Subclass D21g  (16)
10. Impregnating Or Coating Of Paper  (16)
11. Pulp Compositions  (16)
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