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The patent EP3456190 was granted to Merus on Nov 24, 2021. The application was filed on Jun 29, 2009 under application number EP18183980A. 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 |
|---|---|---|---|
| KYMAB | Aug 19, 2022 | CMS CAMERON MCKENNA NABARRO OLSWANG | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | EP0469025 |
| DESCRIPTION | EP1439234 |
| DESCRIPTION | WO2004106375 |
| DESCRIPTION | WO2005068622 |
| DESCRIPTION | WO9852976 |
| OPPOSITION | EP1439234 |
| OPPOSITION | US2006015957 |
| OPPOSITION | US2007280945 |
| OPPOSITION | US2016238600 |
| OPPOSITION | WO02066630 |
| OPPOSITION | WO2004009618 |
| OPPOSITION | WO2004106375 |
| OPPOSITION | WO2006117699 |
| OPPOSITION | WO2008054606 |
| OPPOSITION | WO2008076379 |
| OPPOSITION | WO9850431 |
| SEARCH | EP0814159 |
| SEARCH | EP1439234 |
| SEARCH | WO02066630 |
| SEARCH | WO2004106375 |
| SEARCH | WO2005068622 |
| SEARCH | WO2006117699 |
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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Jul 28, 2025
Jul 24, 2025
(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
Oct 18, 2024
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Reply to appeal
Appeal
Jun 18, 2024
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(Electronic) Receipt
Appeal
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Apr 9, 2024
(Electronic) Receipt
Appeal
Apr 9, 2024
Apr 9, 2024
Notice of appeal
Appeal
Feb 16, 2024
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Means of redress
OPPO
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Nov 30, 2022
Document concerning representation
Search/Exam
Sep 7, 2022
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Feb 15, 2022
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Letter accompanying subsequently filed items
Search/Exam
Feb 9, 2022
Dec 7, 2021
Oct 28, 2021
Decision to grant a European patent
Search/Exam
Oct 15, 2021
(Electronic) Receipt
Search/Exam
Oct 15, 2021
French translation of claims
Search/Exam
Oct 15, 2021
German translation of the claims
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Oct 15, 2021
Letter accompanying subsequently filed items
Search/Exam
Jul 26, 2021
Jul 26, 2021
Jul 26, 2021
Intention to grant (signatures)
Search/Exam
Jul 26, 2021
Text intended for grant (clean copy)
Search/Exam
Jul 26, 2021
Text intended for grant (sequence listing)
Search/Exam
Jul 26, 2021
Jun 25, 2021
Annex to the communication
Search/Exam
Jun 25, 2021
Consultation by telephone/in person
Search/Exam
Jun 25, 2021
Jun 22, 2021
Jun 21, 2021
(Electronic) Receipt
Search/Exam
Jun 21, 2021
Amended claims with annotations
Search/Exam
Jun 21, 2021
Amended description with annotations
Search/Exam
Jun 21, 2021
Claims
Search/Exam
Jun 21, 2021
Description
Search/Exam
Jun 21, 2021
Letter accompanying subsequently filed items
Search/Exam
Jun 21, 2021
Letter dealing with oral proceedings
Search/Exam
Jun 14, 2021
Annex to the communication
Search/Exam
Jun 14, 2021
Consultation by telephone/in person
Search/Exam
Jun 14, 2021
May 21, 2021
(Electronic) Receipt
Search/Exam
May 21, 2021
Amended claims with annotations
Search/Exam
May 21, 2021
Amended claims with annotations
Search/Exam
May 21, 2021
Amended claims with annotations
Search/Exam
May 21, 2021
Amended claims with annotations
Search/Exam
May 21, 2021
Amended claims with annotations
Search/Exam
May 21, 2021
Claims
Search/Exam
May 21, 2021
Claims
Search/Exam
May 21, 2021
Claims
Search/Exam
May 21, 2021
Claims
Search/Exam
May 21, 2021
Claims
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May 21, 2021
Letter accompanying subsequently filed items
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May 21, 2021
Letter dealing with oral proceedings
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May 21, 2021
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Mar 5, 2021
Advice of delivery
Search/Exam
Mar 2, 2021
Acknowledgement of a document
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Mar 2, 2021
Annex to the communication
Search/Exam
Mar 2, 2021
Mar 2, 2021
Summons to attend oral proceedings
Search/Exam
Feb 10, 2021
(Electronic) Receipt
Search/Exam
Feb 10, 2021
Advice of delivery
Search/Exam
Feb 10, 2021
Letter accompanying subsequently filed items
Search/Exam
Feb 10, 2021
Letter dealing with oral proceedings
Search/Exam
Feb 8, 2021
Advice of delivery
Search/Exam
Feb 4, 2021
Acknowledgement of a document
Search/Exam
Feb 4, 2021
Annex to the communication
Search/Exam
Feb 4, 2021
Summons to attend oral proceedings
Search/Exam
Nov 27, 2020
(Electronic) Receipt
Search/Exam
Nov 27, 2020
Annex
Search/Exam
Nov 27, 2020
Annex
Search/Exam
Nov 27, 2020
Letter accompanying subsequently filed items
Search/Exam
Nov 27, 2020
Nov 27, 2020
Jul 21, 2020
Annex to the communication
Search/Exam
Jul 21, 2020
Communication from the Examining Division
Search/Exam
May 29, 2020
(Electronic) Receipt
Search/Exam
May 29, 2020
Letter accompanying subsequently filed items
Search/Exam
May 29, 2020
Submission concerning representation
Search/Exam
May 18, 2020
(Electronic) Receipt
Search/Exam
May 18, 2020
Amended claims with annotations
Search/Exam
May 18, 2020
Claims
Search/Exam
May 18, 2020
Letter accompanying subsequently filed items
Search/Exam
May 18, 2020
Jan 7, 2020
Annex to the communication
Search/Exam
Jan 7, 2020
Communication from the Examining Division
Search/Exam
Dec 19, 2019
Examination started
Search/Exam
Sep 20, 2019
(Electronic) Receipt
Search/Exam
Sep 20, 2019
Sep 20, 2019
Amended claims with annotations
Search/Exam
Sep 20, 2019
Amendments received before examination
Search/Exam
Sep 20, 2019
Letter accompanying subsequently filed items
Search/Exam
Mar 25, 2019
Feb 27, 2019
Refund of fees
Search/Exam
Feb 20, 2019
Notification of forthcoming publication
Search/Exam
Feb 18, 2019
Feb 18, 2019
European search opinion
Search/Exam
Feb 18, 2019
European search report
Search/Exam
Feb 18, 2019
Information on Search Strategy
Search/Exam
Jan 28, 2019
Search started
Search/Exam
Nov 2, 2018
(Electronic) Receipt
Search/Exam
Nov 2, 2018
Nov 2, 2018
Drawings
Search/Exam
Nov 2, 2018
Letter accompanying subsequently filed items
Search/Exam
Nov 2, 2018
Oct 4, 2018
Communication to designated inventor
Search/Exam
Oct 4, 2018
Communication to designated inventor
Search/Exam
Oct 4, 2018
Communication to designated inventor
Search/Exam
Oct 4, 2018
Communication to designated inventor
Search/Exam
Sep 14, 2018
(Electronic) Receipt
Search/Exam
Sep 14, 2018
Designation of inventor
Search/Exam
Sep 14, 2018
Letter accompanying subsequently filed items
Search/Exam
Aug 22, 2018
Aug 22, 2018
Deficiency in designation of inventor
Search/Exam
Aug 10, 2018
(Electronic) Receipt
Search/Exam
Aug 10, 2018
Letter concerning fees and payments
Search/Exam
Jul 17, 2018
Abstract
Search/Exam
Jul 17, 2018
Jul 17, 2018
Claims
Search/Exam
Jul 17, 2018
Converted Sequence Listing
Search/Exam
Jul 17, 2018
Description
Search/Exam
Jul 17, 2018
Drawings
Search/Exam
Jul 17, 2018
Oct 27, 2009
Priority document
Search/Exam