- 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: 446
10-year publication summary
|
32
|
42
|
36
|
33
|
35
|
35
|
35
|
27
|
20
|
14
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| GP Cellulose GmbH | 89 |
31 |
| Kemira Oyj | 1207 |
21 |
| International Paper Company | 790 |
16 |
| Andritz Oy | 282 |
14 |
| UPM-Kymmene Corporation | 937 |
14 |
| Ecolab USA Inc. | 5465 |
13 |
| Valmet AB | 503 |
13 |
| GPCP IP Holdings LLC | 1641 |
13 |
| GranBio Intellectual Property Holdings, LLC | 119 |
13 |
| BASF SE | 20892 |
11 |
| Suzano S.A. | 199 |
8 |
| Clean Chemistry, Inc. | 36 |
7 |
| Kimberly-clark Worldwide, Inc. | 5503 |
6 |
| Andritz Inc. | 333 |
6 |
| API Intellectual Property Holdings, LLC | 77 |
6 |
| Arkema France | 4051 |
6 |
| Metsa Fibre Oy | 35 |
6 |
| Novozymes A/S | 3320 |
5 |
| Buckman Laboratories International, Inc. | 235 |
5 |
| Metsa Board Oyj | 53 |
5 |
| Other owners | 227 |