Patent No. EP2439285 (titled "Method To Determine Responsiveness Of Cancer To Epidermal Growth Factor Receptor Targeting Treatments") was filed by Dana Farber Cancer Institute on Mar 31, 2005. The application was issued on May 8, 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 |
|---|---|---|
| BOULT WADE TENNANT | Feb 10, 2020 | BOULT WADE TENNANT |
| JAMES POOLE | Feb 10, 2020 | CARPMAELS & RANSFORD |
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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