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The patent EP3923943 was granted to Mirum Pharmaceuticals on Jul 31, 2024. The application was originally filed on Feb 12, 2020 under application number EP20755296A. The patent is currently recorded with a legal status of "Granted And Under Opposition".
Modulating bile acid transport in cholestatic liver disease through targeted inhibition of apical sodium-dependent bile acid transporters (ASBTIs). The ASBTIs specifically target the apical bile acid export pump (BSEP) to prevent bile acid reabsorption and promote bile acid excretion. The treatment modulates the ASBTI dosage to achieve optimal bile acid clearance while maintaining bile acid levels within therapeutic ranges. The method utilizes genetic testing to predict the response to ASBTI therapy based on the patient's ABCB11 gene sequence, which determines the functional status of the BSEP protein.

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 |
|---|---|---|---|
| GENERICS UK | Apr 30, 2025 | RUSSELL | ADMISSIBLE |
| SANDOZ | Apr 30, 2025 | MAIWALD | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | US2014243281 |
| INTERNATIONAL-SEARCH-REPORT | US9040518 |
| INTERNATIONAL-SEARCH-REPORT | WO2017167935 |
| INTERNATIONAL-SEARCH-REPORT | WO2018002827 |
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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Decision to grant a European patent
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Jun 21, 2024
(Electronic) Receipt
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Jun 21, 2024
Filing of the translations of the claims
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Jun 21, 2024
French translation of claims
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Jun 21, 2024
German translation of the claims
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Jun 21, 2024
Letter accompanying subsequently filed items
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Jun 13, 2024
Jun 5, 2024
(Electronic) Receipt
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Intention to grant (signatures)
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Apr 11, 2024
Text intended for grant (clean copy)
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(Electronic) Receipt
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Mar 14, 2024
Amended description with annotations
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Mar 14, 2024
Description
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Mar 14, 2024
Letter accompanying subsequently filed items
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Mar 14, 2024
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Intention to grant (signatures)
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Dec 5, 2023
Text intended for grant (clean copy)
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Examination started
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Jun 13, 2023
(Electronic) Receipt
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Jun 13, 2023
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Amended claims with annotations
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Jun 13, 2023
Amendments received before examination
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Jun 13, 2023
Letter accompanying subsequently filed items
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European search opinion
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Information on Search Strategy
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Supplementary European search report
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Oct 26, 2022
Search started
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Jul 12, 2022
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(Electronic) Receipt
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Mar 28, 2022
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Amended claims with annotations
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Mar 28, 2022
Amendments received before examination
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Mar 28, 2022
Letter accompanying subsequently filed items
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Nov 24, 2021
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Sep 13, 2021
(Electronic) Receipt
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Sep 13, 2021
Request for entry into the European phase
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Aug 30, 2021
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Notification of the recording of a change
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Aug 7, 2021
Notification of the recording of a change
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Jun 25, 2021
Information on entry into European phase
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Sep 7, 2020
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Copy of the international search report
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Aug 20, 2020
Published international application - A1
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