- All sections
- C - Chemistrymetallurgy
- C01B - Non-metallic elementscompounds thereof
- C01B 3/52 - Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification by contacting with liquidsRegeneration of used liquids
Patent holdings for IPC class C01B 3/52
Total number of patents in this class: 381
10-year publication summary
|
17
|
35
|
22
|
20
|
10
|
20
|
29
|
31
|
32
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
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 | 4040 |
37 |
| Linde Aktiengesellschaft | 1458 |
23 |
| Shell Internationale Research Maatschappij B.V. | 3500 |
15 |
| ThermoChem Recovery International, Inc. | 98 |
14 |
| Uop LLC | 4275 |
13 |
| Air Products and Chemicals, Inc. | 1451 |
12 |
| Johnson Matthey Davy Technologies Limited | 479 |
10 |
| Casale SA | 634 |
9 |
| Saudi Arabian Oil Company | 13865 |
9 |
| Johnson Matthey Public Limited Company | 1737 |
8 |
| Topsoe A/S | 985 |
8 |
| Mitsubishi Heavy Industries, Ltd. | 8964 |
6 |
| SABIC Global Technologies B.V. | 4460 |
6 |
| Haldor Topsøe A/S | 640 |
6 |
| Shell Oil Company | 2114 |
5 |
| Fluor Technologies Corporation | 370 |
5 |
| ThyssenKrupp Industrial Solutions AG | 631 |
5 |
| BP Alternative Energy International Limited | 22 |
4 |
| FuelCell Energy, Inc. | 327 |
4 |
| Gascontec GmbH | 38 |
4 |
| Other owners | 178 |