- All sections
- C - Chemistrymetallurgy
- C01B - Non-metallic elementscompounds thereof
- C01B 21/02 - Preparation of nitrogen
Patent holdings for IPC class C01B 21/02
Total number of patents in this class: 89
10-year publication summary
|
7
|
6
|
4
|
4
|
9
|
8
|
6
|
5
|
12
|
4
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nederlandse Organisatie voor Toegepast-natuurwetenschappelijk Onderzoek TNO | 2445 |
5 |
| Saudi Arabian Oil Company | 14305 |
5 |
| Air Products and Chemicals, Inc. | 1469 |
3 |
| Firehawk Aerospace, Inc. | 25 |
3 |
| Wisconsin Alumni Research Foundation | 3900 |
2 |
| Arizona Board of Regents on behalf of Arizona State University | 2962 |
2 |
| The Arizona Board of Regents on Behalf of the University of Arizona | 2310 |
2 |
| Casale SA | 639 |
2 |
| CFD Research Corporation | 58 |
2 |
| Kemira Oyj | 1264 |
2 |
| King Fahd University of Petroleum & Minerals | 195 |
2 |
| North Carolina State University | 1595 |
2 |
| Pioneer Astronautics | 16 |
2 |
| ThyssenKrupp Uhde GmbH | 381 |
2 |
| William Marsh Rice University | 1078 |
2 |
| National Technology & Engineering Solutions of Sandia, LLC | 1953 |
2 |
| EnerCat | 5 |
2 |
| Ekona Power Inc. | 55 |
2 |
| Lynas Rare Earths Limited | 19 |
2 |
| Elemental Recycling, Inc. | 9 |
2 |
| Other owners | 41 |