Patent No. EP2591180 (titled "Improved Siphonic Roof Drain And New Use In A Siphonic Roof Drain System") was filed by Aquadraat Engineering Bvba on Jul 1, 2011. The application was issued on Sep 12, 2018.

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 |
|---|---|---|
| DYKA B V | Jun 12, 2019 | GEURTS |
| GEBERIT | Jun 5, 2019 | KONIG SZYNKA TILMANN VON RENESSE PATENTANWALTE PARTNERSCHAFT MBB MUNCHEN |
| GEBERIT | Jun 5, 2019 | SZYNKA SMORODIN PATENTANWALTE PARTNERSCHAFT |
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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