Patent No. EP3494237 (titled "Use Of Olive Mill Waste Waters In The Leather Tanning Industry") was filed by Tannow on Aug 3, 2017. The application was issued on Sep 3, 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 |
|---|---|---|
| WET GREEN | Jan 14, 2022 | DOMPATENT VON KREISLER SELTING WERNER |
| WET GREEN | Jan 14, 2022 | 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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