Patent No. EP2588167 (titled "Safety Device For A Pre-Filled Syringe And Injection Device") was filed by Sanofi Aventis Deutschland on Jun 21, 2011. The application was issued on Feb 21, 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 |
|---|---|---|
| WEST PHARMACEUTICAL SERVICES | Nov 21, 2018 | CROSTON |
| JANSSEN PHARMACEUTICALS | Nov 21, 2018 | CARPMAELS & RANSFORD |
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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