D21D 1/14

Sub-Class

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Description

Class  D21D : TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE


Subclass 1/14: Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F) Methods of beating; Beaters of the Hollander type Beaters with one beater roll and with vertical stuff circulation canal

Recent Patents

Patent #TitleFiling DateIssue DatePatent Owner
10322395 Process and system for producing pulp, energy, and bioderivatives from plant-based and recycled materialsNov 27, 17Jun 18, 19Tyton Biosciences, LLC

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