- All sections
- C - Chemistrymetallurgy
- C01B - Non-metallic elementscompounds thereof
- C01B 25/04 - Purification of phosphorus
Patent holdings for IPC class C01B 25/04
Total number of patents in this class: 13
10-year publication summary
|
1
|
1
|
1
|
2
|
0
|
0
|
4
|
0
|
1
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| The United States of America, as represented by the Secretary of Agriculture | 1101 |
3 |
| The 13th Research Institute of China Electronics Technology Group Corporation | 125 |
2 |
| Kennametal Inc. | 1386 |
1 |
| Arr-maz Products, L.P. | 70 |
1 |
| Dongying Jieda Chemical Technology Co., Ltd. | 1 |
1 |
| Eliquo STULZ GmbH | 12 |
1 |
| Nippon Chemical Industrial Co., Ltd. | 282 |
1 |
| Haldor Topsøe A/S | 659 |
1 |
| NGF Nature Energy Biogas A/S | 6 |
1 |
| Topsoe A/S | 891 |
1 |
| Other owners | 0 |