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Creation Date 

1. Before 1964  (40)
2. 1964 To 1978  (116)
3. 1979 To 1993  (269)
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Subject 

1. Paper Not Otherwise Provided For  (614)
2. Preparation Thereof Not Covered By Subclasses D21c Or D21d  (614)
3. Impregnating Or Coating Of Paper  (614)
4. Pulp Compositions  (614)
5. Treatment Of Finished Paper Not Covered By Class B31 Or Subclass D21g  (614)
6. Apparatus Therefor  (579)
7. Regeneration Of Pulping Liquors  (577)
8. Production Of Cellulose By Removing Non-Cellulose Substancesfrom Cellulose-Containing Materials  (577)
9. Compositions Based Thereon  (468)
10. Their Preparation Or Chemical Working-Up  (468)
11. Organic Macromolecular Compounds  (468)
12. Transporting  (277)
13. Performing Operations  (277)
14. Biochemistry  (223)
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Language 

1. English  (864)
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6. Swedish  (35)
7. Japanese  (29)
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