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The patent EP2658542 was granted to Intervet on Jun 4, 2025. The application was filed on Dec 22, 2011 under application number EP11813330A. 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 |
|---|---|---|---|
| VIRBAC | Oct 25, 2022 | GEVERS & ORES | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US2007066617 |
| DESCRIPTION | US3950360 |
| DESCRIPTION | US3984564 |
| DESCRIPTION | US4916154 |
| DESCRIPTION | US5288710 |
| DESCRIPTION | US5399717 |
| DESCRIPTION | WO2007079162 |
| DESCRIPTION | WO2009002809 |
| DESCRIPTION | WO2009003075 |
| DESCRIPTION | WO2009024541 |
| DESCRIPTION | WO2010070068 |
| DESCRIPTION | WO2010079077 |
| DESCRIPTION | WO2011075591 |
| DESCRIPTION | WO2011124998 |
| INTERNATIONAL-SEARCH-REPORT | US2004116419 |
| INTERNATIONAL-SEARCH-REPORT | WO2006042099 |
| INTERNATIONAL-SEARCH-REPORT | WO2009024541 |
| OPPOSITION | EP2658541 |
| OPPOSITION | US2007066617 |
| OPPOSITION | US5874479 |
| OPPOSITION | WO2006042099 |
| OPPOSITION | WO2006127399 |
| OPPOSITION | WO2006127406 |
| OPPOSITION | WO2006127487 |
| OPPOSITION | WO2007079162 |
| OPPOSITION | WO2008098168 |
| OPPOSITION | WO2008151214 |
| OPPOSITION | WO2009002809 |
| OPPOSITION | WO2009003075 |
| OPPOSITION | WO2009024541 |
| OPPOSITION | WO2010070068 |
| OPPOSITION | WO2010079077 |
| OPPOSITION | WO2010096623 |
| OPPOSITION | WO2018039508 |
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.
Date
Description
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OPPO
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OPPO
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Decision to grant a European patent
Search/Exam
Dec 17, 2021
(Electronic) Receipt
Search/Exam
Dec 17, 2021
Filing of the translations of the claims
Search/Exam
Dec 17, 2021
French translation of claims
Search/Exam
Dec 17, 2021
German translation of the claims
Search/Exam
Dec 17, 2021
Letter accompanying subsequently filed items
Search/Exam
Oct 21, 2021
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Intention to grant (signatures)
Search/Exam
Oct 21, 2021
Text intended for grant (clean copy)
Search/Exam
Oct 21, 2021
Aug 17, 2021
(Electronic) Receipt
Search/Exam
Aug 17, 2021
Amended claims with annotations
Search/Exam
Aug 17, 2021
Amended description with annotations
Search/Exam
Aug 17, 2021
Claims
Search/Exam
Aug 17, 2021
Description
Search/Exam
Aug 17, 2021
Letter accompanying subsequently filed items
Search/Exam
Aug 17, 2021
Apr 28, 2021
Annex to the communication
Search/Exam
Apr 28, 2021
Communication from the Examining Division
Search/Exam
Feb 6, 2019
(Electronic) Receipt
Search/Exam
Feb 6, 2019
Amended claims with annotations
Search/Exam
Feb 6, 2019
Claims
Search/Exam
Feb 6, 2019
Letter accompanying subsequently filed items
Search/Exam
Feb 6, 2019
Oct 23, 2018
Annex to the communication
Search/Exam
Oct 23, 2018
Communication from the Examining Division
Search/Exam
Oct 16, 2018
Examination started
Search/Exam
Jul 16, 2018
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Jan 30, 2014
(Electronic) Receipt
Search/Exam
Jan 30, 2014
Letter accompanying subsequently filed items
Search/Exam
Jan 30, 2014
Reply to Written Opinion prepared by the EPO
Search/Exam
Oct 9, 2013
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Communication to designated inventor
Search/Exam
Aug 6, 2013
Communication to designated inventor
Search/Exam
Aug 6, 2013
Communication to designated inventor
Search/Exam
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Communication to designated inventor
Search/Exam
Aug 6, 2013
Communication to designated inventor
Search/Exam
Aug 1, 2013
Priority search results copy provided by EPO
Search/Exam
Jul 17, 2013
May 27, 2013
(Electronic) Receipt
Search/Exam
May 27, 2013
General authorisation
Search/Exam
May 27, 2013
Request for entry into the European phase
Search/Exam
May 13, 2013
Information on entry into European phase
Search/Exam
Nov 15, 2012
Copy of the international search report
Search/Exam
Nov 15, 2012
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Published international application - A2
Search/Exam
Dec 22, 2011
(Electronic) Receipt
PCTRO
Dec 22, 2011
Abstract
PCTRO
Dec 22, 2011
Claims
PCTRO
Dec 22, 2011
Description
PCTRO
Dec 22, 2011
Drawings
PCTRO
Dec 22, 2011
Dec 22, 2011