- All sections
- C - Chemistrymetallurgy
- C01B - Non-metallic elementscompounds thereof
- C01B 3/50 - Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification
Patent holdings for IPC class C01B 3/50
Total number of patents in this class: 1659
10-year publication summary
|
79
|
75
|
77
|
71
|
70
|
77
|
129
|
134
|
151
|
162
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude | 3998 |
97 |
| Saudi Arabian Oil Company | 13540 |
56 |
| Uop LLC | 4248 |
46 |
| ExxonMobil Research And Engineering Company | 2551 |
45 |
| Topsoe A/S | 944 |
44 |
| Air Products and Chemicals, Inc. | 1450 |
43 |
| Shell Internationale Research Maatschappij B.V. | 3545 |
39 |
| Praxair Technology, Inc. | 1280 |
35 |
| Linde GmbH | 1274 |
30 |
| Casale SA | 626 |
27 |
| Johnson Matthey Public Limited Company | 1877 |
25 |
| Linde Aktiengesellschaft | 1492 |
25 |
| BASF SE | 21078 |
23 |
| Shell Oil Company | 2135 |
22 |
| Iogen Corporation | 149 |
22 |
| Element 1 Corp. | 42 |
20 |
| Haldor Topsøe A/S | 644 |
18 |
| 8 Rivers Capital, LLC | 238 |
17 |
| Aramco Services Company | 4068 |
15 |
| Korea Institute of Energy Research | 868 |
14 |
| Other owners | 996 |