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The patent EP3723739 was granted to Tarsus Pharmaceuticals on Mar 27, 2024. The application was filed on Dec 14, 2018 under application number EP18889875A. The patent is currently recorded with a legal status of "Granted And Under Opposition".
Isoxazoline-based ophthalmic compositions for treating ocular Demodex infestation in humans, specifically targeting blepharitis and rosacea. The compositions contain a potent isoxazoline compound as the active ingredient, formulated in sterile eye drops with a compatible vehicle. The treatment is particularly effective for reducing Demodex mite populations in eyelashes, thereby alleviating symptoms of blepharitis and rosacea.

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 | Dec 23, 2024 | ELKINGTON AND FIFE | ADMISSIBLE |
| HOFFMANN EITLE | Dec 12, 2024 | HOFFMANN EITLE | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US2010137372 |
| DESCRIPTION | US2010179194 |
| DESCRIPTION | US2010179195 |
| DESCRIPTION | US2010254960 |
| DESCRIPTION | US2011059988 |
| DESCRIPTION | US2011086886 |
| DESCRIPTION | US2013344128 |
| DESCRIPTION | US7662972 |
| DESCRIPTION | US7951828 |
| DESCRIPTION | US7964204 |
| DESCRIPTION | US8383659 |
| DESCRIPTION | US8466115 |
| DESCRIPTION | WO2007070606 |
| DESCRIPTION | WO2007075459 |
| DESCRIPTION | WO2007123855 |
| DESCRIPTION | WO2010003923 |
| INTERNATIONAL-SEARCH-REPORT | US2013023490 |
| INTERNATIONAL-SEARCH-REPORT | US2013053374 |
| INTERNATIONAL-SEARCH-REPORT | US2013109642 |
| INTERNATIONAL-SEARCH-REPORT | US2013344128 |
| INTERNATIONAL-SEARCH-REPORT | US2017020849 |
| INTERNATIONAL-SEARCH-REPORT | WO9415597 |
| OPPOSITION | US2007066617 |
| OPPOSITION | US2009061025 |
| OPPOSITION | US2012053140 |
| OPPOSITION | US2013344128 |
| OPPOSITION | US2017020849 |
| OPPOSITION | US2017239218 |
| OPPOSITION | WO2016102437 |
| OPPOSITION | WO2017180788 |
| SEARCH | EP2379537 |
| SEARCH | US2017239218 |
| SEARCH | WO2016102437 |
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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Feb 19, 2024
(Electronic) Receipt
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Feb 19, 2024
Filing of the translations of the claims
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Feb 19, 2024
French translation of claims
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Feb 19, 2024
German translation of the claims
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Intention to grant (signatures)
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Oct 10, 2023
Text intended for grant (clean copy)
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(Electronic) Receipt
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Aug 18, 2023
Amended claims with annotations
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Aug 18, 2023
Claims
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Aug 18, 2023
Letter accompanying subsequently filed items
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Annex to the communication
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(Electronic) Receipt
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Jun 12, 2023
Amended claims with annotations
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Amended description 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
Jan 31, 2023
Annex to the communication
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Jan 31, 2023
Communication from the Examining Division
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Jan 25, 2023
Examination started
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Dec 7, 2022
(Electronic) Receipt
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Dec 7, 2022
Letter accompanying subsequently filed items
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(Electronic) Receipt
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Oct 12, 2022
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Amended claims with annotations
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Oct 12, 2022
Amendments received before examination
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Oct 12, 2022
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Oct 12, 2022
Letter accompanying subsequently filed items
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European search opinion
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Mar 23, 2022
Information on Search Strategy
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Mar 23, 2022
Supplementary European search report
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Mar 14, 2022
Search started
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Feb 15, 2021
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(Electronic) Receipt
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Feb 1, 2021
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Amended claims with annotations
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Feb 1, 2021
Amendments received before examination
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Feb 1, 2021
Letter accompanying subsequently filed items
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Jan 28, 2021
(Electronic) Receipt
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Jan 28, 2021
Letter accompanying subsequently filed items
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Sep 23, 2020
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Change to the inventor details
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Jul 29, 2020
Jul 27, 2020
(Electronic) Receipt
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Jul 27, 2020
Letter accompanying subsequently filed items
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Jul 20, 2020
Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Jul 3, 2020
(Electronic) Receipt
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Jul 3, 2020
Request for entry into the European phase
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Jun 29, 2020
Apr 24, 2020
Information on entry into European phase
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Apr 22, 2020
Notification of the recording of a change
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Notification of the recording of a change
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Notification of the recording of a change
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Notification of the recording of a change
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Notification of the recording of a change
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Copy of the international search report
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Jun 20, 2019
Published international application - A1
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