Patent No. EP2231941 (titled "Studded Plate With Felt") was filed by Isola on Dec 5, 2008. The application was issued on Nov 16, 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 |
|---|---|---|
| INTERPLAST KUNSTSTOFFE | Aug 16, 2017 | MAMMEL UND MASER PATENTANWALTE PARTG MBB |
| WATERMANN POLYWORKS | Aug 14, 2017 | FREISCHEM & PARTNER PATENTANWALTE MBB |
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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