- All sections
- C - Chemistrymetallurgy
- C07C - Acyclic or carbocyclic compounds
- C07C 49/90 - Ketene, i.e. C2H2O
Patent holdings for IPC class C07C 49/90
Total number of patents in this class: 5
10-year publication summary
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0
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1
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0
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0
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0
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0
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0
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0
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1
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1
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| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Rhodia Acetow GmbH | 31 |
1 |
| Smartfish AS | 25 |
1 |
| Titan Wood Limited | 58 |
1 |
| Haldor Topsøe A/S | 641 |
1 |
| Evonik Operations GmbH | 4172 |
1 |
| Other owners | 0 |