Patent No. EP3243877 (titled "A Tyre Comprising Hydrothermally Carbonized Lignin") was filed by Nokian Renkaat OYJ on May 9, 2016. The application was issued on Oct 2, 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 |
|---|---|---|
| UPM KYMMENE | Dec 14, 2018 | HOFFMANN EITLE |
| KOEHLER OBERKIRCH | Dec 14, 2018 | GRUNECKER PATENT |
| SUNCOAL INDUSTRIES | Dec 14, 2018 | GRUNECKER PATENT |
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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