- All sections
- D - Textilespaper
- D21B - Fibrous raw materials or their mechanical treatment
- D21B 1/38 - Conserving the finely-divided cellulosic material
Patent holdings for IPC class D21B 1/38
Total number of patents in this class: 19
10-year publication summary
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0
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0
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2
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4
|
1
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1
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1
|
1
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1
|
1
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| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Stora Enso Oyj | 1650 |
4 |
| Mercer International Inc. | 30 |
3 |
| Eldorado Brasil Celulose S.A. | 5 |
2 |
| FPInnovations | 241 |
2 |
| Stora Enso AB | 35 |
1 |
| Sweetwater Energy, Inc. | 19 |
1 |
| The United States of America, as represented by the Secretary of Agriculture | 1106 |
1 |
| Voith Patent GmbH | 2766 |
1 |
| Weima Maschinenbau GmbH | 13 |
1 |
| Circulose AB | 20 |
1 |
| Goldcup 35335 AB | 3 |
1 |
| We are Bi-rex SRL Societa' Benefit | 1 |
1 |
| Other owners | 0 |