- All sections
- D - Textilespaper
- D21D - Treatment of the materials before passing to the paper-making machine
- D21D 1/34 - Other mills or refiners
Patent holdings for IPC class D21D 1/34
Total number of patents in this class: 31
10-year publication summary
|
1
|
1
|
5
|
1
|
2
|
4
|
3
|
4
|
3
|
2
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Stora Enso Oyj | 1634 |
4 |
| Andritz Inc. | 333 |
2 |
| Borregaard AS | 125 |
2 |
| Domtar Paper Company, LLC | 121 |
2 |
| Valmet AB | 503 |
2 |
| Oxitec Participacao e Gestao de Ativos NAO Financeiros Ltda. | 3 |
2 |
| Panasonic Corporation | 20142 |
1 |
| Mitsubishi Rayon Co., Ltd. | 917 |
1 |
| Mitsubishi Chemical Corporation | 4489 |
1 |
| Aikawa Fiber Technologies Oy | 17 |
1 |
| Catexel Limited | 18 |
1 |
| Centre Technique du Papier | 18 |
1 |
| Cotton Incorporated | 59 |
1 |
| Fiberlean Technologies Limited | 114 |
1 |
| Fristam Pumps USA, LP, Fristam Beteiligungsgesellschaft mbH, German limited liability company and Fristam Pumps of Wisconsin, LLC, a WI LLC | 5 |
1 |
| Imerys Minerals Limited | 120 |
1 |
| Kyoto University | 2798 |
1 |
| Nippon Paper Industries Co., Ltd. | 829 |
1 |
| North Carolina State University | 1558 |
1 |
| Valmet Technologies, Inc. | 147 |
1 |
| Other owners | 3 |