- 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: 4955
10-year publication summary
|
347
|
368
|
337
|
328
|
319
|
305
|
335
|
310
|
344
|
279
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| NGK Insulators, Ltd. | 5129 |
150 |
| FUJIFILM Corporation | 29742 |
149 |
| L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude | 3998 |
142 |
| Saudi Arabian Oil Company | 13540 |
136 |
| Uop LLC | 4248 |
103 |
| Nitto Denko Corporation | 8350 |
88 |
| Dow Global Technologies LLC | 10504 |
77 |
| Membrane Technology and Research, Inc. | 92 |
64 |
| FUJIFILM Manufacturing Europe B.V. | 259 |
60 |
| Sumitomo Chemical Company, Limited | 9089 |
57 |
| Georgia Tech Research Corporation | 2807 |
57 |
| Air Products and Chemicals, Inc. | 1450 |
49 |
| Hamilton Sundstrand Corporation | 4946 |
48 |
| Air Liquide Advanced Technologies U.S. LLC | 90 |
48 |
| Renaissance Energy Research Corporation | 63 |
42 |
| Chevron U.S.A. Inc. | 4011 |
41 |
| Aramco Services Company | 4068 |
40 |
| Praxair Technology, Inc. | 1280 |
40 |
| Mitsubishi Chemical Corporation | 4587 |
38 |
| King Abdullah University of Science and Technology | 1809 |
38 |
| Other owners | 3488 |