Patent No. EP2269577 (titled "Injectable Suspensions Having Improved Injectability Properties") was filed by Alkermes Controlled Therapeutics on Apr 19, 2001. The application was issued on Mar 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 |
|---|---|---|
| NANJING LUYE PHARMACEUTICAL | Dec 16, 2016 | ROSSLER |
| DEHNS | Dec 15, 2016 | DEHNS |
| TEVA PHARMACEUTICAL INDUSTRIES LTD | Dec 15, 2016 | D YOUNG |
| PHARMATHEN | Dec 14, 2016 | APPLEYARD LEES |
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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