Patent No. EP2297517 (titled "Membrane Wall Of A Large-Scale Steam Generator") was filed by Hitachi Power Europe on Apr 21, 2009. The application was issued on May 11, 2016.

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 |
|---|---|---|
| BABCOCK BORSIG STEINMULLER | Feb 10, 2017 | COHAUSZ & FLORACK |
| BALCKE DURR | Feb 10, 2017 | HEIDLER |
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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