- 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: 389
10-year publication summary
|
18
|
36
|
23
|
22
|
11
|
25
|
34
|
36
|
35
|
9
|
| 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 | 4084 |
38 |
| Linde Aktiengesellschaft | 1429 |
23 |
| Shell Internationale Research Maatschappij B.V. | 3431 |
15 |
| Uop LLC | 4396 |
14 |
| ThermoChem Recovery International, Inc. | 96 |
14 |
| Air Products and Chemicals, Inc. | 1471 |
12 |
| Johnson Matthey Davy Technologies Limited | 509 |
10 |
| Casale SA | 634 |
9 |
| Saudi Arabian Oil Company | 14014 |
9 |
| Johnson Matthey Public Limited Company | 1763 |
8 |
| Topsoe A/S | 1030 |
8 |
| Mitsubishi Heavy Industries, Ltd. | 9071 |
6 |
| SABIC Global Technologies B.V. | 4552 |
6 |
| Haldor Topsøe A/S | 637 |
6 |
| Shell Oil Company | 2077 |
5 |
| Fluor Technologies Corporation | 364 |
5 |
| Gascontec GmbH | 40 |
5 |
| ThyssenKrupp Industrial Solutions AG | 630 |
5 |
| BP Alternative Energy International Limited | 22 |
4 |
| FuelCell Energy, Inc. | 327 |
4 |
| Other owners | 183 |