Patent No. EP1347817 (titled "Method For Treating A Gas By Adsorption And Corresponding Installation") was filed by Lair Liquide on Dec 21, 2001. The application was issued on Nov 12, 2014.

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 |
|---|---|---|
| PRAXAIR | Aug 12, 2015 | SCHWAN SCHORER & PARTNER MBB |
| AIR PRODUCTS AND CHEMICALS | Jul 23, 2015 | BECK GREENER |
The dossier documents provide a comprehensive record of the patent's prosecution history - including filings, correspondence, and decisions made by patent offices - and are crucial for understanding the patent's legal journey and any challenges it may have faced during examination.
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