Patent No. EP3157571 (titled "Fatty Acids And Their Use In Conjugation To Biomolecules") was filed by Novartis on Jun 18, 2015. The application was issued on Nov 24, 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 |
|---|---|---|
| DR H ULRICH DORRIES | Aug 24, 2022 | DORRIES |
| DR H ULRICH DORRIES | Aug 24, 2022 | 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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