Patent No. EP2056832 (titled "Compositions, Suitable For Oral Administration, Comprising A Triazolo [4, 5-D]Pyrimidin Derivate") was filed by Astrazeneca on Aug 20, 2007. The application was issued on Mar 22, 2017.

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 |
|---|---|---|
| GENERICS UK TRADING MYLAN | Dec 22, 2017 | GILL JENNINGS & EVERY |
| HEXAL BIOTECH GMBH | Dec 21, 2017 | BASRA |
| HEXAL | Dec 21, 2017 | HERZBERG |
| WITTKOPP | Dec 18, 2017 | HAMM&WITTKOPP PATENTANWÄLTE PARTMBB |
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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