Patent No. EP2905030 (titled "Human Antibodies That Bind Lymphocyte Activation Gene-3 (Lag-3) And Uses Thereof") was filed by E R Squibb & Sons on Aug 11, 2009. The application was issued on Nov 6, 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 |
|---|---|---|
| REGENERON PHARMACEUTICALS | Aug 5, 2020 | HOFFMANN EITLE |
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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