- 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: 445
10-year publication summary
32
|
42
|
36
|
33
|
35
|
35
|
35
|
27
|
20
|
13
|
2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
GP Cellulose GmbH | 90 |
31 |
Kemira Oyj | 1204 |
21 |
International Paper Company | 791 |
16 |
Andritz Oy | 282 |
14 |
UPM-Kymmene Corporation | 937 |
14 |
Ecolab USA Inc. | 5463 |
13 |
Valmet AB | 503 |
13 |
GPCP IP Holdings LLC | 1642 |
13 |
GranBio Intellectual Property Holdings, LLC | 119 |
13 |
BASF SE | 20874 |
11 |
Suzano S.A. | 196 |
8 |
Clean Chemistry, Inc. | 36 |
7 |
Kimberly-clark Worldwide, Inc. | 5502 |
6 |
Andritz Inc. | 333 |
6 |
API Intellectual Property Holdings, LLC | 77 |
6 |
Arkema France | 4036 |
6 |
Metsa Fibre Oy | 35 |
6 |
Novozymes A/S | 3319 |
5 |
Buckman Laboratories International, Inc. | 235 |
5 |
Metsa Board Oyj | 53 |
5 |
Other owners | 226 |