Patent No. EP2496766 (titled "Process For The Production Of A Paper Or Board Product And A Paper Or Board Produced According To The Process") was filed by Stora Enso OYJ on Nov 4, 2010. The application was issued on May 15, 2024.

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 |
|---|---|---|
| BILLERUDKORSNAS | May 2, 2018 | KRANSELL & WENNBORG KB |
| KEMIRA OYJ | May 2, 2018 | PAGE WHITE FARRER |
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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