Patent No. EP2667856 (titled "Medical Device Containing A Cake Composition Comprising Aripiprazole As An Active Ingredient, And A Cake Composition Comprising Aripiprazole As An Active Ingredient") was filed by Otsuka Pharmaceutical on Jan 17, 2012. The application was issued on Dec 1, 2021.

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 |
|---|---|---|
| HAMM & WITTKOPP | Apr 27, 2022 | HAMM & WITTKOPP |
| MAIWALD | Apr 27, 2022 | MAIWALD |
| POLPHARMA | Apr 27, 2022 | ELKINGTON AND FIFE |
| INSTONE TERRY READ HOWARD GRAHAMAPPLEYARD LEES | Apr 21, 2022 | 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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