- All sections
- D - Textilespaper
- D21C - Production of cellulose by removing non-cellulose substances from cellulose- containing materialsregeneration of pulping liquorsapparatus therefor
- D21C 9/08 - Removal of fats, resins, pitch, or waxes
Patent holdings for IPC class D21C 9/08
Total number of patents in this class: 209
10-year publication summary
|
15
|
12
|
19
|
11
|
8
|
7
|
14
|
6
|
8
|
5
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Kemira Oyj | 1197 |
22 |
| Buckman Laboratories International, Inc. | 235 |
10 |
| Kurita Water Industries Ltd. | 1187 |
7 |
| Omya International AG | 771 |
6 |
| Ecolab USA Inc. | 5456 |
5 |
| Hercules Incorporated | 144 |
5 |
| MainTech Co., Ltd. | 65 |
5 |
| Solenis Technologies, L.P. | 331 |
5 |
| MM Board & Paper GmbH | 4 |
4 |
| Solenis Technologies Cayman, L.P. | 46 |
4 |
| Archroma IP GmbH | 459 |
3 |
| Arkema France | 4015 |
3 |
| Association de Gestion de L'ecole Francaise de Papeterie et des Industries Graphiques (agefpi) | 3 |
3 |
| Clariant Finance (BVI) Limited | 393 |
3 |
| Degremont France | 3 |
3 |
| Gun Ei Chemical Industry Co., Ltd. | 42 |
3 |
| L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude | 3937 |
3 |
| Xylem Water Solutions Herford GmbH | 31 |
3 |
| Suzano S.A. | 196 |
3 |
| Risingstar Biotech (Guangzhou) Co., Ltd. | 10 |
3 |
| Other owners | 106 |