- 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: 87
10-year publication summary
|
6
|
6
|
3
|
4
|
9
|
6
|
6
|
3
|
10
|
3
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Saudi Arabian Oil Company | 13937 |
5 |
| Nederlandse Organisatie voor Toegepast-natuurwetenschappelijk Onderzoek TNO | 2406 |
4 |
| Air Products and Chemicals, Inc. | 1463 |
3 |
| Firehawk Aerospace, Inc. | 21 |
3 |
| Wisconsin Alumni Research Foundation | 3930 |
2 |
| Arizona Board of Regents on behalf of Arizona State University | 2818 |
2 |
| The Arizona Board of Regents on Behalf of the University of Arizona | 2251 |
2 |
| Casale SA | 627 |
2 |
| CFD Research Corporation | 58 |
2 |
| Kemira Oyj | 1238 |
2 |
| King Fahd University of Petroleum & Minerals | 195 |
2 |
| North Carolina State University | 1583 |
2 |
| Pioneer Astronautics | 17 |
2 |
| ThyssenKrupp Uhde GmbH | 368 |
2 |
| William Marsh Rice University | 1062 |
2 |
| National Technology & Engineering Solutions of Sandia, LLC | 1927 |
2 |
| Ekona Power Inc. | 58 |
2 |
| Elemental Recycling, Inc. | 10 |
2 |
| Samsung Electronics Co., Ltd. | 152914 |
1 |
| Mitsubishi Heavy Industries, Ltd. | 9004 |
1 |
| Other owners | 42 |