Patent No. EP2563944 (titled "Damage Tolerant Aluminium Material Having A Layered Microstructure") was filed by Hydro Extruded Solutions on Apr 26, 2010. The application was issued on Jun 18, 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 |
|---|---|---|
| ST EXTRUDED PRODUCTS GERMANY | Mar 18, 2015 | MULLER SCHUPFNER & PARTNER PATENT UND RECHTSANWALTSPARTNERSCHAFT MBB MUC |
| C TEC CONSTELLIUM TECHNOLOGY CENTER CONSTELLIUM VALAIS | Aug 1, 2014 | - |
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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