Patent No. EP3568522 (titled "Transfer Paper For Sublimation Printing, Comprising An Alkaline Earth Salt") was filed by Ahlstrom Munksj OYJ on Jan 10, 2018. The application was issued on Nov 18, 2020.

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.
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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