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The patent EP2515887 was granted to LTS Lohmann Therapie Systeme on Jun 6, 2018. The application was filed on Dec 22, 2010 under application number EP10796399A. The patent is currently recorded with a legal status of "Opposition Rejected".
Stabilizing rotigotine transdermal patches to prevent crystallization and improve long-term stability by using a specific ratio of rotigotine to polyvinylpyrrolidone (PVP) in the patch matrix. The weight ratio of rotigotine to PVP should be in the range of 9:3.5 to 9:6. This ratio allows PVP to stabilize rotigotine and prevent crystallization without affecting drug release.

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 | Opposition Status |
|---|---|---|---|
| GENERICS UK | Mar 6, 2019 | ELKINGTON AND FIFE | ADMISSIBLE |
| LUYE PHARMA SWITZERLAND | Mar 4, 2019 | LEDERER & KELLER PATENTANWALTE PARTNERSCHAFT MBB | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | WO2007EP05381 |
| DESCRIPTION | EP1256339 |
| DESCRIPTION | WO02089777 |
| DESCRIPTION | WO0211903 |
| DESCRIPTION | WO03092677 |
| DESCRIPTION | WO2004012730 |
| DESCRIPTION | WO2004050083 |
| DESCRIPTION | WO2005009424 |
| DESCRIPTION | WO2005063236 |
| DESCRIPTION | WO2005063237 |
| DESCRIPTION | WO2005092331 |
| DESCRIPTION | WO2009068120 |
| DESCRIPTION | WO9407468 |
| DESCRIPTION | WO9949852 |
| INTERNATIONAL-SEARCH-REPORT | EP1669063 |
| INTERNATIONAL-SEARCH-REPORT | EP2177217 |
| INTERNATIONAL-SEARCH-REPORT | US2009202647 |
| INTERNATIONAL-SEARCH-REPORT | WO03092677 |
| OPPOSITION | EP0737066 |
| OPPOSITION | EP1669063 |
| OPPOSITION | EP2177217 |
| OPPOSITION | US2005079206 |
| OPPOSITION | US2005260254 |
| OPPOSITION | US2009299304 |
| OPPOSITION | WO03092677 |
| OPPOSITION | WO2009068520 |
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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PCTRO
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