- All sections
- D - Textiles; paper
- D21C - Production of cellulose by removing non-cellulose substances from cellulose- containing materials; regeneration of pulping liquors; apparatus 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: 134
10-year publication summary
|
6
|
17
|
11
|
8
|
5
|
10
|
8
|
15
|
13
|
0
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Kimberly-clark Worldwide, Inc. | 5854 |
8 |
| Valmet AB | 463 |
8 |
| Purac Biochem B.V. | 502 |
7 |
| Andritz Oy | 276 |
5 |
| The Michigan Biotechnology Institute | 19 |
5 |
| Leaf Sciences Pty Ltd | 5 |
5 |
| Qilu University of Technology | 154 |
5 |
| Board of Trustees of Michigan State University | 1141 |
3 |
| Cellucomp Limited | 34 |
3 |
| Cosun Biobased Products B.V. | 7 |
3 |
| Hubei Jinhanjiang Refined Cotton Co., Ltd. | 7 |
3 |
| Metso Paper, Inc. | 528 |
3 |
| Metso Paper Sweden Aktiebolag | 48 |
3 |
| Shell Internationale Research Maatschappij B.V. | 3792 |
2 |
| E. I. du Pont de Nemours and Company | 4345 |
2 |
| Shell Oil Company | 2196 |
2 |
| Bahia Specialty Cellulose SA | 5 |
2 |
| Case Western Reserve University | 1727 |
2 |
| FPInnovations | 259 |
2 |
| Lenzing Aktiengesellschaft | 529 |
2 |
| Other owners | 59 |