- All sections
- C - Chemistrymetallurgy
- C21C - Processing of pig-iron, e.g. refining, manufacture of wrought-iron or steeltreatment in molten state of ferrous alloys
- C21C 5/44 - Refractory linings
Patent holdings for IPC class C21C 5/44
Total number of patents in this class: 76
10-year publication summary
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4
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5
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4
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5
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5
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5
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4
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4
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5
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7
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| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Refractory Intellectual Property GmbH & Co. KG | 553 |
12 |
| Krosakiharima Corporation | 290 |
5 |
| Harbisonwalker International, Inc. | 215 |
4 |
| Vesuvius Group S.A. | 102 |
4 |
| Paul Wurth S.A. | 421 |
3 |
| Primetals Technologies Austria GmbH | 548 |
3 |
| Shinagawa Refractories Co., Ltd. | 53 |
3 |
| Harbisonwalker International Holdings, Inc. | 51 |
3 |
| ArcelorMittal | 2384 |
2 |
| Inductotherm Corp. | 158 |
2 |
| Novelis Inc. | 767 |
2 |
| Resco Products, Inc. | 133 |
2 |
| SMS Siemag Aktiengesellschaft | 500 |
2 |
| Techemet, LP, composed of Techemet Holdings, Inc., General Partner | 16 |
2 |
| Siemens VAI Metals Technologies GmbH | 213 |
1 |
| Lam Research Corporation | 5362 |
1 |
| ArcelorMittal Investigacion y Desarrollo SL | 209 |
1 |
| Baoshan Iron & Steel Co., Ltd. | 985 |
1 |
| Berry Metal Company | 52 |
1 |
| BlueScope Steel Limited | 204 |
1 |
| Other owners | 21 |