Patent No. EP3498734 (titled "Combination Of A Pd-1 Antagonist And A Vegfr Inhibitor For Treating Cancer") was filed by Merck Sharp & Dohme on Feb 3, 2015. The application was issued on Sep 1, 2021.

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 |
|---|---|---|
| KONIG SZYNKA TILMANN VON RENESSE | Jun 1, 2022 | KONIG SZYNKA TILMANN VON RENESSE DUSSELDORF |
| KONIG SZYNKA TILMANN VON RENESSE | Jun 1, 2022 | KONIG SZYNKA TILMANN VON RENESSE PATENTANWALTE PARTNERSCHAFT MBB DUSSELDORF |
| PAJARO | May 31, 2022 | ALT |
| PAJARO | May 31, 2022 | BIRD & BIRD |
| POHLMAN | May 31, 2022 | POHLMAN |
| BOULT WADE TENNANT | May 27, 2022 | - |
| SYMBIOSIS | May 26, 2022 | SYMBIOSIS |
| HOFFMANN EITLE | May 20, 2022 | - |
| WUESTHOFF & WUESTHOFF PATENTANWALTE PARTG MBB | May 13, 2022 | WICHMANN |
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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