Patent No. EP2893049 (titled "Ferritic Stainless Steel Sheet, Method For The Production Thereof, And Use Of Same, Especially In Exhaust Lines") was filed by Aperam Stainless France on Sep 3, 2012. The application was issued on Oct 7, 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 |
|---|---|---|
| OUTOKUMPU OYJ | Jul 5, 2021 | LAINE |
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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