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The patent EP4233850 was granted to Chemocentryx on Oct 2, 2024. The application was filed on Nov 27, 2019 under application number EP23160271A. 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 |
|---|---|---|---|
| LEK PHARMACEUTICALS DD | Jun 12, 2025 | ELKINGTON AND FIFE | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| OPPOSITION | EP2381778 |
| OPPOSITION | US2007298099 |
| OPPOSITION | US2010311753 |
| OPPOSITION | US2011086844 |
| OPPOSITION | US2013312973 |
| OPPOSITION | US2016346207 |
| OPPOSITION | US2017246186 |
| OPPOSITION | US2018179160 |
| OPPOSITION | US2018280530 |
| OPPOSITION | US8632763 |
| OPPOSITION | WO2011163640 |
| OPPOSITION | WO2017123716 |
| OPPOSITION | WO2019089534 |
| OTHER | EP2381778 |
| OTHER | US2011086844 |
| OTHER | WO2017123716 |
| OTHER | WO2019089534 |
| SEARCH | US2018179160 |
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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Description
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Sep 5, 2024
Decision to grant a European patent
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Aug 22, 2024
(Electronic) Receipt
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Aug 22, 2024
Filing of the translations of the claims
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Aug 22, 2024
French translation of claims
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Aug 22, 2024
German translation of the claims
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Aug 22, 2024
Letter accompanying subsequently filed items
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Intention to grant (signatures)
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Apr 25, 2024
Text intended for grant (clean copy)
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(Electronic) Receipt
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Apr 11, 2024
Amended claims with annotations
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Apr 11, 2024
Claims
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Apr 11, 2024
Letter accompanying subsequently filed items
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(Electronic) Receipt
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Mar 5, 2024
Letter accompanying subsequently filed items
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Mar 5, 2024
Non-patent literature filed by a third party
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Mar 5, 2024
Non-patent literature filed by a third party
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Mar 5, 2024
Observations by third parties
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Mar 5, 2024
Patent document filed by a Third party
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Patent document filed by a Third party
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Patent document filed by a Third party
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Patent document filed by a Third party
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Intention to grant (signatures)
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Dec 11, 2023
Text intended for grant (clean copy)
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Examination started
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Oct 18, 2023
(Electronic) Receipt
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Oct 18, 2023
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Amended claims with annotations
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Oct 18, 2023
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Amended description with annotations
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Oct 18, 2023
Amendments received before examination
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Oct 18, 2023
Letter accompanying subsequently filed items
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Sep 25, 2023
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Refund of fees
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Aug 22, 2023
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European search opinion
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Aug 22, 2023
European search report
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Aug 22, 2023
Information on Search Strategy
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Aug 2, 2023
Notification of forthcoming publication
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Jul 31, 2023
Search started
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Jun 27, 2023
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Annexes in respect of a client data request
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Jun 21, 2023
Letter accompanying subsequently filed items
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(Electronic) Receipt
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May 16, 2023
Annex
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May 16, 2023
Claims
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May 16, 2023
Letter accompanying subsequently filed items
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May 16, 2023
Matter concerning the application
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Apr 5, 2023
Refund of fees
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Mar 16, 2023
Invitation to file claims
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Mar 6, 2023
Abstract
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Mar 6, 2023
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Annex
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Mar 6, 2023
Description
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Mar 6, 2023
Designation of inventor
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Mar 6, 2023
Drawings
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Mar 6, 2023
Matter concerning the application
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Mar 6, 2023
Request for grant of a European patent
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Jun 23, 2020