Patent No. EP2349522 (titled "Method For Treating Sea Water With A View To Producing Injection Water For Undersea Petroleum Drilling, And Corresponding Equipment") was filed by OTV on Sep 25, 2008. The application was issued on Feb 25, 2015.

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 |
|---|---|---|
| RO SOLUTIONS | Nov 25, 2015 | ACAPO ONSAGERS |
| WATER STANDARD MANAGEMENT | Nov 25, 2015 | OSHA LIANG |
| M INNOVATIVE PROPERTIES | Nov 24, 2015 | VOSSIUS & PARTNER PATENTANWALTE RECHTSANWALTE MBB |
| SIEMENS | Nov 20, 2015 | - |
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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