Patent No. EP4179162 (titled "An Inspection Chamber Base Or Manhole Base, An Inspection Chamber Or Manhole, A Plug For An Inspection Chamber Base Or A Manhole Base") was filed by Wavin on Jul 2, 2021. The application was issued on Sep 10, 2025.

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.
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