Patent No. EP1143019 (titled "Sheet Steel And Method For Producing Sheet Steel") was filed by JFE Steel on Sep 27, 2000. The application was issued on Nov 26, 2014.

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 | Aug 26, 2015 | KRUIT |
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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