- 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: 1570
10-year publication summary
|
84
|
81
|
99
|
83
|
89
|
67
|
118
|
163
|
255
|
126
|
| 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 | 3974 |
38 |
| Air Products and Chemicals, Inc. | 1423 |
36 |
| Saudi Arabian Oil Company | 13044 |
34 |
| Sawafuji Electric Co., Ltd. | 61 |
24 |
| Amogy Inc. | 50 |
24 |
| Japan Technological Research Association of Artificial Photosynthetic Chemical Process | 58 |
23 |
| SABIC Global Technologies B.V. | 4332 |
23 |
| Intelligent Energy Inc. | 52 |
18 |
| BASF SE | 20912 |
17 |
| Toyota Motor Corporation | 31903 |
17 |
| Mitsubishi Heavy Industries, Ltd. | 8703 |
15 |
| The University of Tokyo | 4170 |
15 |
| Panasonic Corporation | 20128 |
14 |
| TOYOTA JIDOSHA KABUSHIKI KAISHA (also trading as TOYOTA MOTOR CORPORATION) | 12813 |
14 |
| Gifu University | 133 |
13 |
| Hitachi Zosen Corporation | 619 |
13 |
| FUJIFILM Corporation | 29329 |
12 |
| Stamicarbon B.V. Acting under The Name of MT Innovation Center | 54 |
12 |
| Kabushiki Kaisha Toyota Jidoshokki | 1750 |
12 |
| Centre National de La Recherche Scientifique | 10418 |
11 |
| Other owners | 1185 |