Patent No. EP1260520 (titled "Chromosome 13-Linked Breast Cancer Susceptibility Gene") was filed by Endo Recherche on Dec 17, 1996. The application was issued on Sep 10, 2014.

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 |
|---|---|---|
| ASSISTANCE PUBLIQUE HOPITAUX DE PARIS INSTITUT CURIE INSTITUT GUSTAVE ROUSSY | Jun 10, 2015 | REGIMBEAU |
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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