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The patent EP3842456 was granted to Zoetis Services on Sep 18, 2024. The application was filed on Jul 5, 2012 under application number EP20194926A. The patent is currently recorded with a legal status of "Granted And Under Opposition".

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 |
|---|---|---|---|
| MARGARET DIXON | Jun 16, 2025 | MEWBURN ELLIS | ADMISSIBLE |
| BOEHRINGER INGELHEIM | Jun 13, 2025 | D YOUNG | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US2003031671 |
| DESCRIPTION | US5350576 |
| DESCRIPTION | US6194167 |
| DESCRIPTION | US6680053 |
| DESCRIPTION | US6774107 |
| DESCRIPTION | US6790639 |
| OTHER | EP2734549 |
| SEARCH | US2009252732 |
| SEARCH | US2010075996 |
| SEARCH | WO03060080 |
| SEARCH | WO2006122079 |
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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Document concerning representation
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Feb 7, 2025
Letter accompanying subsequently filed items
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Oct 1, 2024
Aug 22, 2024
Decision to grant a European patent
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Jun 18, 2024
Jun 10, 2024
(Electronic) Receipt
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Jun 10, 2024
Filing of the translations of the claims
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Jun 10, 2024
French translation of claims
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Jun 10, 2024
German translation of the claims
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Jun 10, 2024
Letter accompanying subsequently filed items
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Jun 7, 2024
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Intention to grant (signatures)
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Jun 7, 2024
Text intended for grant (clean copy)
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Jun 7, 2024
Apr 2, 2024
(Electronic) Receipt
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Apr 2, 2024
Amended claims with annotations
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Apr 2, 2024
Claims
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Apr 2, 2024
Description
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Apr 2, 2024
Letter accompanying subsequently filed items
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Apr 2, 2024
Mar 26, 2024
Annex to the communication
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(Electronic) Receipt
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Sep 21, 2023
Letter accompanying subsequently filed items
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Sep 21, 2023
Matter concerning the application
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Aug 28, 2023
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(Electronic) Receipt
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Aug 18, 2023
Citation filed by a third party
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Aug 18, 2023
Citation filed by a third party
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Aug 18, 2023
Letter accompanying subsequently filed items
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Aug 18, 2023
Non-patent literature filed by a third party
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Aug 18, 2023
Observations by third parties
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Jun 12, 2023
(Electronic) Receipt
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Jun 12, 2023
Amended claims with annotations
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Jun 12, 2023
Claims
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Jun 12, 2023
Description
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Jun 12, 2023
Letter accompanying subsequently filed items
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Jun 12, 2023
Feb 15, 2023
Annex to the communication
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Feb 15, 2023
Communication from the Examining Division
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Feb 9, 2023
Examination started
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Dec 29, 2021
(Electronic) Receipt
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Dec 29, 2021
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Amended claims with annotations
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Dec 29, 2021
Amendments received before examination
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Dec 29, 2021
Letter accompanying subsequently filed items
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Jul 5, 2021
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Notification of forthcoming publication
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May 25, 2021
Refund of fees
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May 19, 2021
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European search opinion
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May 19, 2021
European search report
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May 19, 2021
Information on Search Strategy
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May 10, 2021
Search started
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Dec 7, 2020
(Electronic) Receipt
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Dec 7, 2020
Claims
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Dec 7, 2020
Letter accompanying subsequently filed items
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Dec 7, 2020
Matter concerning the application
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Nov 18, 2020
Communication to designated inventor
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Nov 18, 2020
Communication to designated inventor
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Oct 7, 2020
Invitation to file claims
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Sep 25, 2020
(Electronic) Receipt
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Sep 25, 2020
Letter accompanying subsequently filed items
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Sep 25, 2020
Letter concerning fees and payments
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Sep 7, 2020
Abstract
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Sep 7, 2020
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Converted Sequence Listing
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Sep 7, 2020
Description
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Sep 7, 2020
Designation of inventor
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Sep 7, 2020
Drawings
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Sep 7, 2020
Request for grant of a European patent
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Feb 13, 2013
Jul 5, 2012
Converted Sequence Listing
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