Description
Class D21D : TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
Subclass 1/26: Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F) Methods of refining Jordans Jordan bed plates
D21D 1/26
Sub-Class
Stats
- 7 US PATENTS IN FORCE
- 5 US APPLICATIONS PENDING
- 2 Total Patent Owners
- 25 TOTAL INVENTORS
Recent Patents
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 11555273 | Flow-altering refiner segment | Nov 08, 21 | Jan 17, 23 | Andritz, Inc. |
| 11142869 | Blade segment for refiner | May 10, 18 | Oct 12, 21 | Valmet Technologies, Inc. |
| 10975499 | Surface enhanced pulp fibers, methods of making surface enhanced pulp fibers, products incorporating surface enhanced pulp fibers, and methods of making products incorporating surface enhanced pulp fibers | Aug 01, 16 | Apr 13, 21 | Domtar Paper Company, LLC |
| 10704165 | Surface enhanced pulp fibers, methods of making surface enhanced pulp fibers, products incorporating surface enhanced pulp fibers, and methods of making products incorporating surface enhanced pulp fibers | Aug 01, 16 | Jul 07, 20 | Domtar Paper Company, LLC |
| 10400393 | Refiner | Dec 23, 14 | Sep 03, 19 | Valmet AB |
| 9879361 | Surface enhanced pulp fibers, methods of making surface enhanced pulp fibers, products incorporating surface enhanced pulp fibers, and methods of making products incorporating surface enhanced pulp fibers | Mar 15, 13 | Jan 30, 18 | DOMTAR PAPER COMPANY, LLC |
| 9145641 | Apparatus for disperser plate and method to refine paper | Nov 18, 13 | Sep 29, 15 | ANDRITZ INC. |
Recent Publications
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2023/0175,204 | CONICAL INLET TRANSITION ZONE FOR MECHANICAL REFINERS | Dec 03, 21 | Jun 08, 23 | Andritz, Inc. |
| 2022/0333,303 | FLOW-ALTERING REFINER SEGMENT | Nov 08, 21 | Oct 20, 22 | Not available |
| 2022/0154,399 | PRODUCTION METHOD | Mar 20, 20 | May 19, 22 | Not available |
| 2021/0108,367 | Multiple Feed and Multiple Discharge Refiner | Oct 09, 20 | Apr 15, 21 | VALMET TECHNOLOGIES OY |
| 2019/0330,798 | REFINER BAR PLATE INCLUDING MICRO-FINE BAR AND METHOD FOR MANUFACTURING SAME | Nov 24, 17 | Oct 31, 19 | Not available |
Top Owners in This Subclass
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Patents Issued To Date - By Filing Year
Average Time to Issuance
- 29 Months (last 2 years Issuances)
- 29 Months (last 5 years Issuances)