Patent No. EP3416760 (titled "Planishing Roll, Method For Planishing A Flat Product Therewith And Flat Product Therefrom") was filed by Salzgitter Flachstahl on Feb 13, 2017. The application was issued on Apr 29, 2020.

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 |
|---|---|---|
| ARCELORMITTAL | Jan 29, 2021 | PLAISANT |
| TATA STEEL IJMUIDEN | Jan 29, 2021 | GROUP SERVICES |
| SMS GROUP | Jan 29, 2021 | HEMMERICH & KOLLEGEN |
| TENOVA | Jan 27, 2021 | MANITZ FINSTERWALD PATENT UND RECHTSANWALTSPARTNERSCHAFT MBB |
| THYSSENKRUPP STEEL EUROPE | Jan 13, 2021 | THYSSENKRUPP STEEL EUROPE |
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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