Patent No. EP1539403 (titled "Device For The Continuous Casting Of Metals, In Particular Steel Material, To Form Elongated Products In A Multiple Casting Line") was filed by SMS Demag on Sep 2, 2003. The application was issued on Jan 4, 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 |
|---|---|---|
| PRIMETALS AUSTRIA | Oct 3, 2017 | MIKOTA |
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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