D21D 1/18

Sub-Class

Watch

Stats

Description

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


Subclass 1/18: Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F) Methods of beating; Beaters of the Hollander type Beaters with two or more beater rolls

Recent Patents

Patent #TitleFiling DateIssue DatePatent Owner
11261565 Defibration processing device, and fibrous feedstock recycling deviceMar 27, 19Mar 01, 22SEIKO EPSON CORPORATION

more results

Recent Publications

Not Available

Top Owners in This Subclass

Upgrade to the Professional Level to view Top Owners for this Subclass.Learn More

Patents Issued To Date - By Filing Year

Average Time to Issuance