Description
Class D21D : TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
Subclass 1/28: Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F) Methods of refining Ball or rod mills
D21D 1/28
Sub-Class
Stats
- 1 US PATENTS IN FORCE
- 2 US APPLICATIONS PENDING
- 0 Total Patent Owners
- 8 TOTAL INVENTORS
Recent Patents
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 12209363 | Method for producing microscale and/or nanoscale fiber material | Apr 05, 18 | Jan 28, 25 | Weidmann Holding AG |
Recent Publications
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2024/0368,835 | GRINDING METHOD AND GRINDING MEDIUM | Apr 29, 24 | Nov 07, 24 | Not available |
| 2024/0295,075 | REFINER PLATE TO PREVENT GROOVES PLUGGING | Jan 10, 24 | Sep 05, 24 | Andritz, Inc. |
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
- 31 Months (last 2 years Issuances)
- 31 Months (last 5 years Issuances)