Patent No. EP3716979 (titled "Combination Of A 4-Pyrimidinesulfamide Derivative With An Sglt-2 Inhibitor For The Treatment Of Endothelin Related Diseases") was filed by Idorsia Pharmaceuticals on Nov 29, 2018. The application was issued on Apr 9, 2025.

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 |
|---|---|---|
| ELKINGTON AND FIFE | Jan 8, 2026 | ELKINGTON AND FIFE |
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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