Patent No. EP3288980 (titled "Treatment Of Pd-L1-Positive Melanoma Using An Anti-Pd-1 Antibody") was filed by Bristol Myers Squibb on Apr 28, 2016. The application was issued on Mar 10, 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 |
|---|---|---|
| GREINER | Dec 10, 2021 | GREINER |
| POHLMAN | Dec 10, 2021 | POHLMAN |
| PAJARO | Dec 9, 2021 | BIRD & BIRD |
| KRAUS & LEDERER PARTGMBB | Dec 8, 2021 | KRAUS & LEDERER PARTGMBB |
| DR H ULRICH DORRIES | Dec 7, 2021 | DORRIES |
| DR H ULRICH DORRIES | Dec 7, 2021 | DORRIES, HANS ULRICH , DF-MP DORRIES FRANK-MOLNIA & POHLMAN |
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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