Patent No. EP1791519 (titled "Therapeutic Foam") was filed by BTG on Nov 17, 2004. The application was issued on Jul 19, 2017.

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 |
|---|---|---|
| CHEMISCHE FABRIK KREUSSLER | Apr 19, 2018 | DOMPATENT VON KREISLER SELTING WERNER |
| CHEMISCHE FABRIK KREUSSLER | Apr 19, 2018 | DOMPATENT VON PATENT UND RECHTSANWALTEN |
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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