Patent No. EP2609428 (titled "Potency Test For Vaccine Formulations") was filed by Intervet on Aug 26, 2011. The application was issued on Feb 10, 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 |
|---|---|---|
| SAGITTARIUS INTELLECTUAL PROPERTY LLP | Nov 10, 2016 | SAGITTARIUS |
| ZOETIS SERVICES | Nov 10, 2016 | FRIEDRICH, RAINER |
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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