Patent No. EP2692900 (titled "Film Formation Composition For Preventing Blackening Of Steel Sheet, And Steel Sheet Having Film Formed By Composition") was filed by Noroo Coil Coatings on Mar 28, 2012. The application was issued on Aug 9, 2017.

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 FRANCE RESEARCH & INTELLECTUAL | May 9, 2018 | PLAISANT |
| ARCELORMITTAL | May 9, 2018 | LAVOIX |
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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