Patent No. EP3902670 (titled "Apparatus For Monitoring The Lubricating State Of A Rotating Belt, To Which A Lubricant Has Been Applied, For Transporting Material To Be Pressed") was filed by Siempelkamp Maschinen UND Anlagenbau on Feb 26, 2020. The application was issued on Jul 12, 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 |
|---|---|---|
| DIEFFENBACHER MASCHINEN UND ANLAGENBAU | Apr 12, 2024 | LBP LEMCKE |
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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