Patent No. EP3310501 (titled "Waste Separation Method, Method Of Manufacturing A Recyclable Item, Item Comprising A Pattern, Mould For Moulding An Item, Method Of Identifying An Item") was filed by Filigrade on Jun 17, 2016. The application was issued on Jun 7, 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 |
|---|---|---|
| BARDEHLE PAGENBERG PARTNERSCHAFT MBB PATENTANWALTE | Mar 7, 2024 | BARDEHLE PAGENBERG PARTNERSCHAFT MBB PATENTANWALTE RECHTSANWALTE |
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