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Patent No. EP2894165 (titled "Methods And Compositions For Treating Complement-Associated Disorders") was filed by Alexion Pharmaceuticals on Nov 10, 2009. The application was issued on Jan 4, 2023.

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 |
|---|---|---|
| SAMSUNG BIOEPIS | Oct 4, 2023 | SIMMONS & SIMMONS MUNICH |
| AMGEN TECHNOLOGY IRELAND UNLIMITED | May 17, 2023 | DORRIES |
| AMGEN TECHNOLOGY IRELAND UNLIMITED | May 17, 2023 | 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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