- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F25J - Liquefaction, solidification, or separation of gases or gaseous mixtures by pressure and cold treatment
- F25J 3/04 - Processes or apparatus for separating the constituents of gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
Patent holdings for IPC class F25J 3/04
Total number of patents in this class: 968
10-year publication summary
|
88
|
79
|
87
|
78
|
66
|
62
|
75
|
72
|
43
|
8
|
| 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 | 4037 |
318 |
| Praxair Technology, Inc. | 1258 |
178 |
| Linde Aktiengesellschaft | 1459 |
97 |
| Linde GmbH | 1322 |
88 |
| Air Products and Chemicals, Inc. | 1450 |
27 |
| 8 Rivers Capital, LLC | 240 |
24 |
| Taiyo Nippon Sanso Corporation | 369 |
23 |
| Saudi Arabian Oil Company | 13857 |
16 |
| Siemens AG | 24278 |
8 |
| Saipem S.p.A. | 517 |
8 |
| Nuovo Pignone Tecnologie S.r.l. | 1108 |
7 |
| Rtx Corporation | 9761 |
7 |
| Topsoe A/S | 985 |
6 |
| Pilot Intellectual Property, LLC | 39 |
4 |
| ExxonMobil Upstream Research Company | 2358 |
3 |
| IFP Energies Nouvelles | 3006 |
3 |
| Nanjing Reclaimer Environmental Teknik Co., Ltd. | 16 |
3 |
| Palmer Labs, LLC | 29 |
3 |
| L' Air Liquide Societe Anonyme Pour L' Etude et L' Exploitation des procedes Georges Claude | 54 |
3 |
| Zeine, Inc. | 5 |
3 |
| Other owners | 139 |