Patent No. EP4255973 (titled "Nanocellular Expanded Polymer Beads, Method Of Manufacture And Uses") was filed by Cellmat SL on Dec 1, 2021. The application was issued on Oct 30, 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 |
|---|---|---|
| MICHALSKI HTTERMANN & PARTNER | Jul 29, 2025 | - |
| MICHALSKI HUTTERMANN & PARTNER PATENTANWALTE MBB | Jul 29, 2025 | - |
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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