- 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: 201
10-year publication summary
|
12
|
19
|
11
|
8
|
7
|
14
|
6
|
9
|
9
|
3
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Kemira Oyj | 1262 |
23 |
| Kurita Water Industries Ltd. | 1292 |
8 |
| Buckman Laboratories International, Inc. | 239 |
7 |
| Omya International AG | 779 |
6 |
| Ecolab USA Inc. | 5826 |
5 |
| MainTech Co., Ltd. | 66 |
5 |
| Solenis Technologies, L.P. | 304 |
5 |
| Hercules Incorporated | 113 |
4 |
| Dow Global Technologies LLC | 11029 |
3 |
| Archroma IP GmbH | 461 |
3 |
| Arkema France | 4254 |
3 |
| Association de Gestion de L'ecole Francaise de Papeterie et des Industries Graphiques (agefpi) | 3 |
3 |
| Clariant Finance (BVI) Limited | 353 |
3 |
| Degremont France | 3 |
3 |
| Gun Ei Chemical Industry Co., Ltd. | 45 |
3 |
| L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude | 4132 |
3 |
| Stora Enso Oyj | 1660 |
3 |
| Xylem Water Solutions Herford GmbH | 30 |
3 |
| Italmatch Chemicals GB Limited | 64 |
3 |
| Risingstar Biotech (Guangzhou) Co., Ltd. | 10 |
3 |
| Other owners | 102 |