Description
Class D21D : TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
Subclass 1/32: Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F) Methods of refining Hammer mills
D21D 1/32
Sub-Class
Stats
- 2 US PATENTS IN FORCE
- 0 US APPLICATIONS PENDING
- 1 Total Patent Owners
- 4 TOTAL INVENTORS
Recent Patents
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 10196775 | Method for processing grass for manufacturing paper, paperboard and cardboard | Dec 17, 14 | Feb 05, 19 | Not available |
| 9023180 | Method and apparatus for producing product from stock pulp sheet | Mar 05, 13 | May 05, 15 | UNI-CHARM CORPORATION |
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
- 37 Months (last 2 years Issuances)
- 37 Months (last 5 years Issuances)