- All sections
- D - Textilespaper
- D21C - Production of cellulose by removing non-cellulose substances from cellulose- containing materialsregeneration of pulping liquorsapparatus therefor
- D21C 7/14 - Means for circulating the lye
Patent holdings for IPC class D21C 7/14
Total number of patents in this class: 53
10-year publication summary
|
7
|
6
|
2
|
2
|
0
|
0
|
1
|
0
|
2
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Valmet AB | 503 |
12 |
| Shell Oil Company | 2141 |
6 |
| Andritz Oy | 282 |
6 |
| Shell Internationale Research Maatschappij B.V. | 3551 |
5 |
| Ecolab USA Inc. | 5475 |
3 |
| International Paper Company | 790 |
3 |
| Andritz Inc. | 333 |
2 |
| CNH Industrial Canada, Ltd. | 965 |
2 |
| Metso Paper Sweden Aktiebolag | 44 |
2 |
| Centre de Recherche Industrielle du Quebec | 50 |
1 |
| FPInnovations | 244 |
1 |
| Istanbul Teknik Universitesi | 167 |
1 |
| Metso Fiber Karlstad AB | 19 |
1 |
| Nalco Company | 563 |
1 |
| Solenis Technologies, L.P. | 334 |
1 |
| Stora Enso Oyj | 1637 |
1 |
| Sulzer Management AG | 660 |
1 |
| Trifilon AB | 18 |
1 |
| Fibratech Pte. Ltd | 3 |
1 |
| Prüf- und Forschungsinstitut Pirmasens E. V. | 1 |
1 |
| Other owners | 1 |