Patent No. EP3520737 (titled "Collapsible And Re-Expandable Prosthetic Heart Valve Cuff Designs And Complementary Technological Applications") was filed by ST Jude Medical on Jul 15, 2009. The application was issued on May 10, 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 |
|---|---|---|
| BOSTON SCIENTIFIC | Feb 12, 2024 | PETERREINS SCHLEY |
| EDWARDS LIFESCIENCES | Feb 9, 2024 | SOMERVILLE |
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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