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Subject 

1. Textiles  (189)
2. Production Of Cellulose  (175)
3. Paper-Making  (175)
4. Apparatus Therefor  (124)
5. Regeneration Of Pulping Liquors  (123)
6. Production Of Cellulose By Removing Non-Cellulose Substancesfrom Cellulose-Containing Materials  (123)
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12. Preparation Thereof Not Covered By Subclasses D21c Or D21d  (35)
13. Impregnating Or Coating Of Paper  (35)
14. Pulp Compositions  (35)
15. Treatment Of Finished Paper Not Covered By Class B31 Or Subclass D21g  (35)
16. Fibrous Raw Materials Or Their Mechanical Treatment  (27)
17. Physical Or Chemical Processes Or Apparatus In General  (23)
18. Methods Of Producing Paper Thereon  (19)
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Databases 

1. esp@cenet  (218)
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3. HathiTrust Digital Library Full View U.S. Only  (1)
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