Patent No. EP3502293 (titled "Duplex Stainless Steels And Uses Thereof") was filed by Saipem on Dec 22, 2017. The application was issued on May 13, 2020.

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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