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The patent EP3981427 was granted to Glaxosmithkline on Jul 27, 2022. The application was filed on Aug 31, 2011 under application number EP21205422A. The patent is currently recorded with a legal status of "Revoked".

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 |
|---|---|---|---|
| JG OPPOSITIONS | Feb 27, 2023 | MEWBURN ELLIS | ADMISSIBLE |
| MARGARET DIXON | Feb 24, 2023 | MEWBURN ELLIS | ADMISSIBLE |
| WEICKMANN & WEICKMANN | Feb 23, 2023 | - | ADMISSIBLE |
| SANOFI | Feb 21, 2023 | ELKINGTON AND FIFE | ADMISSIBLE |
| THOMANN | Feb 21, 2023 | - | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| OPPOSITION | EP3981427 |
| OPPOSITION | WO02095023 |
| OPPOSITION | WO2005120152 |
| OPPOSITION | WO2005121348 |
| OPPOSITION | WO2006078294 |
| OPPOSITION | WO2007047749 |
| OPPOSITION | WO2011005799 |
| OPPOSITION | WO2011008974 |
| OPPOSITION | WO2011068810 |
| OPPOSITION | WO2012006369 |
| OPPOSITION | WO2012006372 |
| OPPOSITION | WO2012006376 |
| OPPOSITION | WO2012006377 |
| OPPOSITION | WO2012006378 |
| OPPOSITION | WO2012030901 |
| OPPOSITION | WO2012031043 |
| OPPOSITION | WO2014160243 |
| OPPOSITION | WO2017049245 |
| OPPOSITION | WO2017075531 |
| OPPOSITION | WO2022137133 |
| OPPOSITION | WO9011092 |
| SEARCH | WO2008103276 |
| SEARCH | WO2009086558 |
| SEARCH | WO2009111088 |
| SEARCH | WO2011005799 |
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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Decision to grant a European patent
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Amended claims with annotations
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Claims
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Description
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Letter accompanying subsequently filed items
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Annex to the communication
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Communication from the Examining Division
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Notification of forthcoming publication
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Refund of fees
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European search report
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Mar 4, 2022
Information on Search Strategy
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Search started
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Oct 28, 2021
Abstract
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Oct 28, 2021
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Claims
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Oct 28, 2021
Description
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Oct 28, 2021
Designation of inventor
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Oct 28, 2021
Drawings
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Oct 28, 2021
Letter concerning search matters
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Oct 28, 2021
Matter concerning the application
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Oct 28, 2021
Request for grant of a European patent
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May 11, 2012