Patent No. EP2568967 (titled "Pharmaceutical Compositions Comprising Hydromorphone And Naloxone") was filed by Euro Celtique on May 10, 2011. The application was issued on Jul 27, 2022.

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 |
|---|---|---|
| NEIDLEIN | Jul 24, 2019 | GILLE HRABAL PARTNERSCHAFTSGESELLSCHAFT MBB PATENTANWALTE |
| ALGOBATE | Jul 23, 2019 | TER MEER STEINMEISTER & PARTNER |
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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