Patent No. EP3131912 (titled "Process For Efficient Purification Of Neutral Human Milk Oligosaccharides (Hmos) From Microbial Fermentation") was filed by CHR Hansen HMO on Dec 23, 2014. The application was issued on Jan 22, 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.
| Company | Opposition Date | Representative |
|---|---|---|
| BASF | Oct 22, 2020 | ALTMANN STOSSEL DICK PATENTANWALTE PARTG MBB |
| DANISCO | Oct 21, 2020 | N&H EMEA |
| GREAVES BREWSTER | Oct 21, 2020 | GREAVES BREWSTER |
| FRIESLANDCAMPINA NEDERLAND | Oct 5, 2020 | FRIESLANDCAMPINA DEPARTMENT |
| NESTLE | Feb 24, 2020 | ALT |
| GLYCOM | Jan 23, 2020 | STRYCH |
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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