Patent No. EP2204156 (titled "Fragrance Composition For Core Shell Microcapsules") was filed by Takasago on Dec 29, 2009. The application was issued on Feb 1, 2017.

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 |
|---|---|---|
| FLAVORS & FRAGRANCES | Nov 1, 2017 | BARKER BRETTELL |
| THE PROCTER & GAMBLE | Nov 1, 2017 | GILL JENNINGS & EVERY |
| GIVAUDAN | Oct 31, 2017 | HASELTINE LAKE KEMPNER |
| HENKEL | Oct 30, 2017 | VIERING |
| FIRMENICH | Oct 25, 2017 | RUPP |
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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