Patent No. EP2759403 (titled "Humidity Adaptive Vapour Retarder") was filed by Silu Verwaltung on Jan 29, 2013. The application was issued on Apr 27, 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 |
|---|---|---|
| BIOLOGISCHE INSEL LOTHAR MOLL GMBH & CO. KG | Jan 27, 2017 | STT SOZIETAT THEWS & THEWS |
| TREMCO ILLBRUCK PRODUKTION | Jan 24, 2017 | BITTNER |
| SAINT-GOBAIN ISOVER G+H AG | May 12, 2016 | BOCKHORNI & BRUNTJEN PARTNERSCHAFT 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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