- All sections
- B - Performing operationstransporting
- B28B - Shaping clay or other ceramic compositionsshaping slagshaping mixtures containing cementitious material, e.g. plaster
- B28B 21/72 - Producing multilayer tubes
Patent holdings for IPC class B28B 21/72
Total number of patents in this class: 26
10-year publication summary
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0
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1
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0
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2
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1
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0
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1
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0
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1
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0
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| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| BASF SE | 20432 |
2 |
| Covestro Deutschland AG | 2692 |
2 |
| Covestro LLC | 581 |
2 |
| Schlumberger Technology Corporation | 10263 |
1 |
| Royal Bank of Canada | 1938 |
1 |
| The Sherwin-Williams Company | 559 |
1 |
| GM Global Technology Operations LLC | 14260 |
1 |
| Engineered Polymer Solutions, Inc. (a Delaware corporation) | 150 |
1 |
| Lancer Systems L.P. | 12 |
1 |
| Novo Plastics Inc. | 11 |
1 |
| Pittsburgh Corning Corporation | 7 |
1 |
| Rolls-Royce Corporation | 1719 |
1 |
| Schlusselbauer, Johann | 5 |
1 |
| Soda Club Ltd. | 2 |
1 |
| The Valspar Corporation | 155 |
1 |
| Valspar Sourcing, Inc. | 353 |
1 |
| Watt Fuel Cell Corp. | 154 |
1 |
| SWIMC, LLC | 2457 |
1 |
| The Sherwin-Williams Headquarters Company | 151 |
1 |
| Verescence France | 8 |
1 |
| Other owners | 3 |