Patent No. EP3253377 (titled "Monomethylfumarate Prodrug Compositions") was filed by Alkermes Pharma Ireland on Mar 10, 2015. The application was issued on May 12, 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 |
|---|---|---|
| GENERICS UK | Feb 11, 2022 | ELKINGTON AND FIFE |
| TEVA PHARMACEUTICALS | Feb 11, 2022 | D YOUNG |
| ADALVO | Feb 7, 2022 | BRAND MURRAY FULLER |
| SANDOZ | Jan 20, 2022 | KRAUS & LEDERER PARTGMBB |
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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