- All sections
- B - Performing operationstransporting
- B01D - Separation
- B01D 53/52 - Hydrogen sulfide
Patent holdings for IPC class B01D 53/52
Total number of patents in this class: 1121
10-year publication summary
|
75
|
93
|
112
|
88
|
87
|
69
|
45
|
64
|
74
|
49
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Saudi Arabian Oil Company | 13185 |
53 |
| Mitsubishi Heavy Industries, Ltd. | 8725 |
52 |
| The Kansai Electric Power Co., Inc. | 134 |
21 |
| Ecolab USA Inc. | 5491 |
20 |
| IFP Energies Nouvelles | 2933 |
20 |
| Aramco Services Company | 3976 |
19 |
| Uop LLC | 4244 |
15 |
| Shell Internationale Research Maatschappij B.V. | 3537 |
14 |
| Streamline Innovations, Inc. | 61 |
13 |
| BASF SE | 20915 |
12 |
| ExxonMobil Research And Engineering Company | 2572 |
12 |
| Dow Global Technologies LLC | 10332 |
12 |
| Evoqua Water Technologies LLC | 916 |
11 |
| ExxonMobil Upstream Research Company | 2397 |
11 |
| Mitsubishi Heavy Industries Engineering, Ltd. | 196 |
11 |
| King Fahd University of Petroleum and Minerals | 1201 |
10 |
| Air Products and Chemicals, Inc. | 1424 |
9 |
| Dorf Ketal Chemicals (India) Private Limited | 74 |
9 |
| L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude | 3985 |
9 |
| Shell Oil Company | 2139 |
8 |
| Other owners | 780 |