- 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 3/14 - Pulping cellulose-containing materials with acids, acid salts, or acid anhydrides bisulfites ammonium bisulfite
Patent holdings for IPC class D21C 3/14
Total number of patents in this class: 6
10-year publication summary
|
1
|
0
|
0
|
0
|
0
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0
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0
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2
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0
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0
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| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Ip2ipo Innovations Limited | 164 |
2 |
| Sund Group s.r.o. | 4 |
2 |
| Imperial Innovations Limited | 608 |
1 |
| Shangdong Fuyin Paper & Environmental Protection Technology Co., Ltd. | 1 |
1 |
| Other owners | 0 |