Patent No. EP3823631 (titled "Methods Of Treating Hfpef Employing Dapagliflozin And Compositions Comprising The Same") was filed by Astrazeneca on Jul 18, 2019. The application was issued on May 20, 2026.

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 |
|---|---|---|
| BUSSE & BUSSE PATENT UND RECHTSANWALTE PARTNERSCHAFT MBB | May 20, 2026 | BUSSE & BUSSE |
| AWA DENMARK | May 20, 2026 | AWA DENMARK |
| GENERICS UK | May 20, 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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