Patent No. EP3290199 (titled "Coated Steel Strips, Methods Of Making The Same, Methods Of Using The Same, Stamping Blanks Prepared From The Same, Stamped Products Prepared From The Same, And Articles Of Manufacture Which Contain Such A Stamped Product") was filed by Arcelormittal on Oct 30, 2006. The application was issued on Oct 15, 2025.

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 |
|---|---|---|
| TATA STEEL IJMUIDEN | May 21, 2020 | GROUP SERVICES |
| VOLKSWAGEN | May 21, 2020 | LIEBL |
| SALZGITTER FLACHSTAHL | May 20, 2020 | MOSER GOTZE & PARTNER PATENTANWALTE MBB |
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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