- All sections
- C - Chemistrymetallurgy
- C01B - Non-metallic elementscompounds thereof
- C01B 3/04 - Production of hydrogen or of gaseous mixtures containing hydrogen by decomposition of inorganic compounds, e.g. ammonia
Patent holdings for IPC class C01B 3/04
Total number of patents in this class: 1681
10-year publication summary
|
81
|
76
|
93
|
78
|
87
|
65
|
101
|
151
|
246
|
219
|
| 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 | 4000 |
44 |
| Air Products and Chemicals, Inc. | 1455 |
40 |
| Saudi Arabian Oil Company | 13686 |
40 |
| Amogy Inc. | 52 |
26 |
| Sawafuji Electric Co., Ltd. | 62 |
24 |
| Japan Technological Research Association of Artificial Photosynthetic Chemical Process | 59 |
23 |
| SABIC Global Technologies B.V. | 4405 |
23 |
| BASF SE | 21098 |
20 |
| Toyota Motor Corporation | 33519 |
18 |
| Intelligent Energy Inc. | 51 |
18 |
| Mitsubishi Heavy Industries, Ltd. | 8900 |
16 |
| The University of Tokyo | 4250 |
16 |
| Linde GmbH | 1288 |
15 |
| Panasonic Corporation | 19952 |
14 |
| TOYOTA JIDOSHA KABUSHIKI KAISHA (also trading as TOYOTA MOTOR CORPORATION) | 12657 |
14 |
| Gifu University | 128 |
13 |
| Hitachi Zosen Corporation | 614 |
13 |
| Korea Research Institute of Chemical Technology | 1413 |
13 |
| First Ammonia Motors Inc. | 20 |
13 |
| FUJIFILM Corporation | 29839 |
12 |
| Other owners | 1266 |