- All sections
- D - Textilespaper
- D21C - Production of cellulose by removing non-cellulose substances from cellulose- containing materialsregeneration of pulping liquorsapparatus therefor
- D21C 9/153 - Bleaching with oxygen or its allotropic modifications with ozone
Patent holdings for IPC class D21C 9/153
Total number of patents in this class: 65
10-year publication summary
|
8
|
1
|
3
|
5
|
3
|
5
|
6
|
2
|
4
|
3
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Valmet AB | 555 |
7 |
| Uni-Charm Corporation | 602 |
6 |
| Andritz Oy | 293 |
4 |
| Arkema France | 4249 |
4 |
| AB Enzymes GmbH | 74 |
3 |
| Association de Gestion de L'ecole Francaise de Papeterie et des Industries Graphiques (agefpi) | 3 |
3 |
| Degremont France | 3 |
3 |
| GP Cellulose GmbH | 86 |
3 |
| ITT Manufacturing Enterprises, Inc. | 102 |
3 |
| L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude | 4124 |
3 |
| Xylem Water Solutions Herford GmbH | 30 |
3 |
| Qilu University of Technology | 153 |
3 |
| Andritz Inc. | 322 |
2 |
| Novozymes A/S | 3384 |
1 |
| BIM Kemi AB, | 18 |
1 |
| Innventia AB | 33 |
1 |
| International Paper Company | 599 |
1 |
| Lenzing Aktiengesellschaft | 499 |
1 |
| Linde Aktiengesellschaft | 1420 |
1 |
| Metgen Oy | 43 |
1 |
| Other owners | 11 |