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The patent EP2258847 was granted to Silence Therapeutics on Jul 1, 2020. The application was filed on Aug 5, 2003 under application number EP10012263A. The patent is currently recorded with a legal status of "Patent Maintained As Amended".

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 |
|---|---|---|---|
| SANOFI | Dec 15, 2017 | RAI | WITHDRAWN |
| THE MEDICINES UK | Dec 14, 2017 | MACDONALD | WITHDRAWN |
| ALNYLAM PHARMACEUTICALS | Oct 19, 2017 | POTTER CLARKSON | WITHDRAWN |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | EP0586520 |
| DESCRIPTION | EP0618925 |
| DESCRIPTION | WO0044895 |
| DESCRIPTION | WO0175164 |
| DESCRIPTION | WO9932619 |
| OPPOSITION | EP1144623 |
| OPPOSITION | US6107094 |
| OPPOSITION | US6239272 |
| OPPOSITION | WO0044895 |
| OPPOSITION | WO02055693 |
| OPPOSITION | WO02097114 |
| OPPOSITION | WO0216620 |
| OPPOSITION | WO0244321 |
| OPPOSITION | WO03064621 |
| OPPOSITION | WO03070895 |
| OPPOSITION | WO03070918 |
| OPPOSITION | WO9207065 |
| OPPOSITION | WO9401550 |
| OPPOSITION | WO9618376 |
| OPPOSITION | WO9746570 |
| OPPOSITION | WO9955857 |
| SEARCH | WO0044895 |
| SEARCH | WO02055693 |
| SEARCH | WO0244321 |
| SEARCH | WO03070912 |
| SEARCH | WO9513834 |
| SEARCH | WO9741141 |
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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Submission concerning representation
Search/Exam
Mar 22, 2017
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Decision to grant a European patent
Search/Exam
Feb 3, 2017
(Electronic) Receipt
Search/Exam
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Filing of the translations of the claims
Search/Exam
Feb 3, 2017
French translation of claims
Search/Exam
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German translation of the claims
Search/Exam
Feb 3, 2017
Letter accompanying subsequently filed items
Search/Exam
Oct 24, 2016
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Intention to grant (signatures)
Search/Exam
Oct 24, 2016
Text intended for grant (clean copy)
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Oct 24, 2016
Text intended for grant (sequence listing)
Search/Exam
Oct 24, 2016
Mar 14, 2016
(Electronic) Receipt
Search/Exam
Mar 14, 2016
Amended description with annotations
Search/Exam
Mar 14, 2016
Description
Search/Exam
Mar 14, 2016
Letter accompanying subsequently filed items
Search/Exam
Mar 14, 2016
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(Electronic) Receipt
Search/Exam
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Letter accompanying subsequently filed items
Search/Exam
Jan 21, 2016
Oct 26, 2015
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(Electronic) Receipt
Search/Exam
Oct 21, 2015
Letter accompanying subsequently filed items
Search/Exam
Oct 21, 2015
Sep 14, 2015
Annex to the communication
Search/Exam
Sep 14, 2015
Communication from the Examining Division
Search/Exam
Jul 3, 2015
(Electronic) Receipt
Search/Exam
Jul 3, 2015
Amended claims with annotations
Search/Exam
Jul 3, 2015
Claims
Search/Exam
Jul 3, 2015
Letter accompanying subsequently filed items
Search/Exam
Jul 3, 2015
Feb 23, 2015
Annex to the communication
Search/Exam
Feb 23, 2015
Communication from the Examining Division
Search/Exam
Jan 30, 2015
Jan 23, 2015
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Authorisation
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Letter accompanying subsequently filed items
Search/Exam
Jan 19, 2015
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Letter accompanying subsequently filed items
Search/Exam
Nov 4, 2014
Amended claims with annotations
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Nov 4, 2014
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Nov 4, 2014
Claims
Search/Exam
Nov 4, 2014
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Nov 4, 2014
Letter accompanying subsequently filed items
Search/Exam
Nov 4, 2014
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Aug 6, 2014
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Aug 1, 2014
Apr 24, 2014
Annex to the communication
Search/Exam
Apr 24, 2014
Communication from the Examining Division
Search/Exam
Apr 14, 2014
Examination started
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Feb 18, 2014
Jan 28, 2014
Annexes in respect of a client data request
Search/Exam
Jan 28, 2014
Jan 27, 2014
Annexes in respect of a client data request
Search/Exam
Jan 27, 2014
Aug 5, 2013
Letter accompanying subsequently filed items
Search/Exam
Aug 5, 2013
Letter concerning fees and payments
Search/Exam
Aug 5, 2013
Payment of fees and costs
Search/Exam
Jul 31, 2013
Letter concerning fees and payments
Search/Exam
Jul 31, 2013
Matter concerning the application
Search/Exam
Jul 31, 2013
Payment of fees and costs
Search/Exam
Aug 1, 2012
Letter accompanying subsequently filed items
Search/Exam
Aug 1, 2012
Letter concerning fees and payments
Search/Exam
Jul 31, 2012
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Search/Exam
Jul 31, 2012
Letter concerning fees and payments
Search/Exam
Mar 23, 2012
Decision to allow further processing
Search/Exam
Mar 7, 2012
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Amended claims with annotations
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Mar 7, 2012
Amended claims with annotations
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Mar 7, 2012
Amendments received before examination
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Mar 7, 2012
Amendments received before examination
Search/Exam
Mar 7, 2012
Letter accompanying subsequently filed items
Search/Exam
Mar 7, 2012
Payment of fees and costs
Search/Exam
Mar 7, 2012
Request for further processing
Search/Exam
Dec 28, 2011
Aug 16, 2011
Letter accompanying subsequently filed items
Search/Exam
Aug 16, 2011
Letter concerning fees and payments
Search/Exam
Aug 12, 2011
Letter concerning fees and payments
Search/Exam
Aug 12, 2011
Payment of fees and costs
Search/Exam
May 23, 2011
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Refund of fees
Search/Exam
Apr 18, 2011
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European search opinion
Search/Exam
Apr 18, 2011
European search report
Search/Exam
Jan 4, 2011
Letter concerning the inventor
Search/Exam
Jan 4, 2011
Letter concerning the inventor
Search/Exam
Dec 21, 2010
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Dec 10, 2010
Letter which had not been notified
Search/Exam
Dec 10, 2010
Letter which had not been notified
Search/Exam
Nov 10, 2010
Notification of forthcoming publication
Search/Exam
Oct 21, 2010
Sep 30, 2010
Abstract
Search/Exam
Sep 30, 2010
Claims
Search/Exam
Sep 30, 2010
Description
Search/Exam
Sep 30, 2010
Designation of inventor
Search/Exam
Sep 30, 2010
Drawings
Search/Exam
Sep 30, 2010
Non-scannable object
Search/Exam
Sep 30, 2010
Sep 30, 2010
Sequence listing
Search/Exam
Jun 11, 2004
Jun 11, 2004
Jun 11, 2004