- All sections
- B - Performing operationstransporting
- B01D - Separation
- B01D 53/22 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by diffusion
Patent holdings for IPC class B01D 53/22
Total number of patents in this class: 5348
10-year publication summary
|
389
|
362
|
351
|
345
|
320
|
364
|
348
|
395
|
364
|
369
|
| 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 | 4154 |
163 |
| NGK Insulators, Ltd. | 5161 |
150 |
| Saudi Arabian Oil Company | 14469 |
145 |
| FUJIFILM Corporation | 30873 |
120 |
| Uop LLC | 4411 |
109 |
| Nitto Denko Corporation | 8654 |
108 |
| Dow Global Technologies LLC | 11114 |
87 |
| Membrane Technology and Research, Inc. | 89 |
64 |
| Sumitomo Chemical Company, Limited | 9002 |
63 |
| Georgia Tech Research Corporation | 3006 |
58 |
| Air Products and Chemicals, Inc. | 1479 |
56 |
| Chevron U.S.A. Inc. | 4195 |
48 |
| Hamilton Sundstrand Corporation | 5013 |
46 |
| Aramco Services Company | 4189 |
45 |
| Toray Industries, Inc. | 7167 |
41 |
| Renaissance Energy Research Corporation | 62 |
41 |
| Mitsubishi Chemical Corporation | 4772 |
40 |
| King Abdullah University of Science and Technology | 1879 |
39 |
| Evonik Operations GmbH | 4449 |
39 |
| Yestar Advanced Materials (Suzhou) Co., Ltd. | 42 |
39 |
| Other owners | 3847 |