- All sections
- D - Textilespaper
- D21C - Production of cellulose by removing non-cellulose substances from cellulose- containing materialsregeneration of pulping liquorsapparatus therefor
- D21C 5/00 - Other processes for obtaining cellulose, e.g. cooking cotton linters
Patent holdings for IPC class D21C 5/00
Total number of patents in this class: 592
10-year publication summary
|
39
|
52
|
49
|
53
|
40
|
51
|
31
|
27
|
31
|
16
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Novozymes A/S | 3319 |
28 |
| Kemira Oyj | 1204 |
22 |
| Novozymes, Inc. | 287 |
16 |
| Beijing Tian'an Bioscience & Technology Co., Ltd. | 21 |
16 |
| Lenzing Aktiengesellschaft | 522 |
14 |
| Xyleco, Inc. | 191 |
11 |
| GranBio Intellectual Property Holdings, LLC | 119 |
11 |
| Buckman Laboratories International, Inc. | 235 |
10 |
| Stora Enso Oyj | 1632 |
10 |
| The Coca-Cola Company | 2484 |
9 |
| Enzymatic Deinking Technologies, LLC | 43 |
9 |
| Qilu University of Technology | 153 |
9 |
| Valmet AB | 503 |
8 |
| AB Enzymes Oy | 73 |
7 |
| Metgen Oy | 43 |
7 |
| Infinited Fiber Company Oy | 41 |
7 |
| The Procter & Gamble Company | 22043 |
6 |
| Novozymes North America, Inc. | 130 |
6 |
| Concordia University | 102 |
6 |
| Suzano S.A. | 196 |
6 |
| Other owners | 374 |