- All sections
- C - Chemistrymetallurgy
- C07C - Acyclic or carbocyclic compounds
- C07C 45/87 - Preparation of ketenes or dimeric ketenes
Patent holdings for IPC class C07C 45/87
Total number of patents in this class: 6
10-year publication summary
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1
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0
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0
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1
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0
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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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| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Chevron U.S.A. Inc. | 4190 |
1 |
| Celanese International Corporation | 886 |
1 |
| Rohm GmbH | 260 |
1 |
| Haldor Topsøe A/S | 630 |
1 |
| Topsoe A/S | 1083 |
1 |
| Specialty Operations France | 944 |
1 |
| Other owners | 0 |