Patent No. EP3532189 (titled "A Method For Removing Nitrogen Oxides From A Gas Using An Iron Exchanged Zeolite Catalyst") was filed by Casale on Sep 26, 2017. The application was issued on May 15, 2024.

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 |
|---|---|---|
| THYSSENKRUPP UHDE | Feb 13, 2025 | KUTZENBERGER WOLFF & PARTNER |
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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