- All sections
- D - Textilespaper
- D21C - Production of cellulose by removing non-cellulose substances from cellulose- containing materialsregeneration of pulping liquorsapparatus therefor
- D21C 1/06 - Pretreatment of the finely-divided materials before digesting with alkaline reacting compounds
Patent holdings for IPC class D21C 1/06
Total number of patents in this class: 149
10-year publication summary
|
11
|
11
|
7
|
5
|
7
|
7
|
11
|
12
|
12
|
5
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Kimberly-clark Worldwide, Inc. | 5455 |
9 |
| Valmet AB | 514 |
8 |
| Billerud AB | 126 |
7 |
| Purac Biochem B.V. | 484 |
7 |
| Andritz Oy | 286 |
5 |
| The Michigan Biotechnology Institute | 17 |
5 |
| Qilu University of Technology | 153 |
5 |
| Leaf Sciences Pty Ltd | 4 |
4 |
| Board of Trustees of Michigan State University | 1192 |
3 |
| Cellucomp Limited | 37 |
3 |
| Cosun Biobased Products B.V. | 5 |
3 |
| FPInnovations | 241 |
3 |
| Hubei Jinhanjiang Refined Cotton Co., Ltd. | 9 |
3 |
| Metso Paper Sweden Aktiebolag | 44 |
3 |
| Kanbol, Inc. | 9 |
3 |
| Releaf Paper France SAS | 3 |
3 |
| Shell Internationale Research Maatschappij B.V. | 3553 |
2 |
| E. I. du Pont de Nemours and Company | 4000 |
2 |
| Shell Oil Company | 2138 |
2 |
| Bahia Specialty Cellulose SA | 5 |
2 |
| Other owners | 67 |