Patent No. EP3858606 (titled "Coloured Facade Element With Composite Panel Structure") was filed by Cnbm Bengbu Design & Research Institute FOR Glass Industry on Jan 28, 2020. The application was issued on Sep 7, 2022.

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 |
|---|---|---|
| FRAUNHOFER GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG EV | Jun 6, 2023 | FRIESE GOEDEN PATENTANWALTE PARTGMBB |
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