- All sections
- C - Chemistry; metallurgy
- C01B - Non-metallic elements; compounds 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: 1393
10-year publication summary
|
84
|
91
|
82
|
91
|
81
|
87
|
92
|
164
|
144
|
52
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
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 | 3515 |
77 |
| ExxonMobil Research And Engineering Company | 2830 |
46 |
| Shell Internationale Research Maatschappij B.V. | 3792 |
35 |
| Uop LLC | 4083 |
35 |
| Praxair Technology, Inc. | 1367 |
35 |
| Saudi Arabian Oil Company | 11322 |
34 |
| Topsoe A/S | 732 |
32 |
| Air Products and Chemicals, Inc. | 1448 |
30 |
| Linde Aktiengesellschaft | 1600 |
27 |
| Casale SA | 572 |
24 |
| Shell Oil Company | 2196 |
22 |
| Iogen Corporation | 136 |
19 |
| Haldor Topsøe A/S | 698 |
19 |
| Element 1 Corp. | 34 |
17 |
| Johnson Matthey Public Limited Company | 1852 |
16 |
| Linde GmbH | 1122 |
16 |
| BASF SE | 19740 |
15 |
| Korea Institute of Energy Research | 803 |
13 |
| Enerkem Inc. | 83 |
12 |
| Panasonic Intellectual Property Management Co., Ltd. | 27812 |
11 |
| Other owners | 858 |