- All sections
- C - Chemistrymetallurgy
- C01B - Non-metallic elementscompounds thereof
- C01B 3/12 - Production of hydrogen or of gaseous mixtures containing hydrogen by reaction of inorganic compounds containing electro-positively bound hydrogen, e.g. water, acids, bases, ammonia, with inorganic reducing agents by reaction of water vapour with carbon monoxide
Patent holdings for IPC class C01B 3/12
Total number of patents in this class: 300
10-year publication summary
|
14
|
13
|
8
|
11
|
15
|
14
|
41
|
43
|
39
|
21
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Topsoe A/S | 891 |
26 |
| Uop LLC | 4244 |
13 |
| Shell Internationale Research Maatschappij B.V. | 3540 |
9 |
| SABIC Global Technologies B.V. | 4341 |
9 |
| Saudi Arabian Oil Company | 13155 |
8 |
| Air Products and Chemicals, Inc. | 1423 |
7 |
| Iogen Corporation | 148 |
6 |
| Enerkem Inc. | 84 |
5 |
| L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude | 3975 |
5 |
| Infinium Technology, LLC | 83 |
5 |
| Dioxycle | 66 |
5 |
| Shell Oil Company | 2140 |
4 |
| Johnson Matthey Davy Technologies Limited | 273 |
4 |
| Linde Aktiengesellschaft | 1506 |
4 |
| The Ohio State University Research Foundation | 525 |
4 |
| Sunfire GmbH | 54 |
4 |
| Totalenergies Onetech | 1323 |
4 |
| Mitsubishi Heavy Industries, Ltd. | 8715 |
3 |
| Siemens VAI Metals Technologies GmbH | 222 |
3 |
| Johnson Matthey Public Limited Company | 1850 |
3 |
| Other owners | 169 |