Patent No. EP3286378 (titled "Method And System For Manufacturing A Coated Paperboard And A Coated Paperboard") was filed by Kotkamills Group OYJ on Apr 19, 2016. The application was issued on Apr 10, 2019.

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 |
|---|---|---|
| MAYR MELNHOF KARTON | Jan 10, 2020 | HOFSTETTER |
| METSA BOARD OYJ | Jan 9, 2020 | LAINE |
| STORA ENSO OYJ | Jan 8, 2020 | WALTER |
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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