D21F1/82 - CPC Classification Index

ClassID:

126570 ⎘

D21F1/82 - CPC Classification

Classification description:

Wet end of machines for making continuous webs of paper; Pulp catching, de-watering, or recovering; Re-use of pulp-water adding fibre agglomeration compositions

Recent Application in this class:

20180080175

2018-03-22

Increased drainage performance in papermaking systems using microfibrillated cellulose

20150176208

2015-06-25

Method for manufacturing paper using a cationic polymer obtained by hofmann degradation

20100122786

2010-05-20

APPLICATION OF RETENTION, DRAINAGE, AND FORMATION (RDF) CHEMICAL AIDS AFTER A HEADBOX OF A PAPERMAKING PROCESS

20090277598

2009-11-12

Nut Cracker

20070181506

2007-08-09

Method for treating papermaking waste water, and methods of using silica sol in papermaking