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Creation Date 

1. Before 2005  (5)
2. 2005 To 2011  (4)
3. 2012 To 2015  (20)
4. 2016 To 2020  (14)
5. After 2020  (7)
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Subject 

1. Paper Not Otherwise Provided For  (35)
2. Preparation Thereof Not Covered By Subclasses D21c Or D21d  (35)
3. Impregnating Or Coating Of Paper  (35)
4. Pulp Compositions  (35)
5. Treatment Of Finished Paper Not Covered By Class B31 Or Subclass D21g  (35)
6. Regeneration Of Pulping Liquors  (20)
7. Apparatus Therefor  (20)
8. Production Of Cellulose By Removing Non-Cellulose Substancesfrom Cellulose-Containing Materials  (20)
9. Methods Of Producing Paper Thereon  (16)
10. Paper-Making Machines  (16)
11. Fibrous Raw Materials Or Their Mechanical Treatment  (14)
12. Transporting  (7)
13. Performing Operations  (7)
14. Nailing Or Stapling Machines In General  (5)
15. Working Or Preserving Wood Or Similar Material  (5)
16. Compositions Based Thereon  (4)
17. Chemistry  (4)
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Language 

1. English  (43)
2. Chinese  (36)
3. Korean  (2)
4. German  (1)
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