Patent No. EP2695609 (titled "Oral Formulations Of Cytidine Analogs And Methods Of Use Thereof") was filed by Celgene on May 14, 2009. The application was issued on Dec 11, 2019.

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 |
|---|---|---|
| SANDOZ | Sep 11, 2020 | TER MEER STEINMEISTER & PARTNER GBR |
| HOFFMANN EITLE | Sep 10, 2020 | HOFFMANN EITLE |
| TEVA PHARMACEUTICAL INDUSTRIES LTD | Sep 4, 2020 | D YOUNG |
| GENERICS UK | Aug 30, 2020 | ELKINGTON AND FIFE |
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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