Patent No. EP3959021 (titled "Method For Producing A High Strength Silicon Containing Steel Strip With Excellent Surface Quality And Said Steel Strip Produced Thereby") was filed by Tata Steel Ijmuiden on Apr 17, 2020. The application was issued on Aug 24, 2022.

Patent oppositions filed by competitors challenge the validity of a granted patent. These oppositions are typically based on claims of prior art, lack of novelty, or non-obviousness. They are a key part of the process for determining a patent's strength and enforceability.
| Company | Opposition Date | Representative |
|---|---|---|
| SSAB TECHNOLOGY | May 24, 2023 | MELIN GRANBERG |
The dossier documents provide a comprehensive record of the patent's prosecution history - including filings, correspondence, and decisions made by patent offices - and are crucial for understanding the patent's legal journey and any challenges it may have faced during examination.
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