Patent No. EP2532941 (titled "Method For Packaging No/N2 Mixtures With Draining Stages And Prior Rinsing With Gas") was filed by AIR Liquide Sant on May 3, 2012. The application was issued on Feb 28, 2018.

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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