- All sections
- D - Textilespaper
- D21C - Production of cellulose by removing non-cellulose substances from cellulose- containing materialsregeneration of pulping liquorsapparatus therefor
- D21C 9/10 - Bleaching
Patent holdings for IPC class D21C 9/10
Total number of patents in this class: 453
10-year publication summary
|
36
|
34
|
27
|
32
|
33
|
26
|
25
|
19
|
19
|
2
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| GP Cellulose GmbH | 86 |
31 |
| Kemira Oyj | 1230 |
22 |
| UPM-Kymmene Corporation | 968 |
15 |
| GranBio Intellectual Property Holdings, LLC | 127 |
15 |
| Andritz Oy | 288 |
14 |
| Ecolab USA Inc. | 5654 |
13 |
| Valmet AB | 533 |
13 |
| GPCP IP Holdings LLC | 1595 |
13 |
| BASF SE | 21135 |
12 |
| GCF US Holdings LLC | 132 |
9 |
| International Paper Company | 640 |
8 |
| Suzano S.A. | 207 |
8 |
| Clean Chemistry, Inc. | 40 |
7 |
| Kimberly-clark Worldwide, Inc. | 5303 |
6 |
| Novozymes A/S | 3344 |
6 |
| Andritz Inc. | 328 |
6 |
| API Intellectual Property Holdings, LLC | 78 |
6 |
| Arkema France | 4172 |
6 |
| Metsa Fibre Oy | 41 |
6 |
| Buckman Laboratories International, Inc. | 241 |
5 |
| Other owners | 232 |