The patent EP3811895 was granted to Mitsui Chemicals on Jul 23, 2025. The application was originally filed on Mar 20, 2019 under application number EP19810811A. The patent is currently recorded with a legal status of "Granted And Under Opposition".

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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Aug 5, 2025
Jun 26, 2025
Decision to grant a European patent
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Jun 17, 2025
Jun 13, 2025
(Electronic) Receipt
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Jun 13, 2025
Filing of the translations of the claims
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Jun 13, 2025
French translation of claims
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Jun 13, 2025
German translation of the claims
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Jun 13, 2025
Letter accompanying subsequently filed items
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Jun 10, 2025
(Electronic) Receipt
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Jun 10, 2025
Letter accompanying subsequently filed items
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Jun 10, 2025
Feb 21, 2025
Feb 21, 2025
Feb 21, 2025
Feb 21, 2025
Intention to grant (signatures)
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Feb 21, 2025
Text intended for grant (clean copy)
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Feb 21, 2025
Sep 18, 2024
(Electronic) Receipt
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Sep 18, 2024
Amended description with annotations
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Sep 18, 2024
Description
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Sep 18, 2024
Letter accompanying subsequently filed items
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Sep 18, 2024
Jul 18, 2024
Annex to the communication
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Jul 18, 2024
Communication from the Examining Division
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Jan 16, 2024
Jan 10, 2024
(Electronic) Receipt
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Jan 10, 2024
Amended claims with annotations
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Jan 10, 2024
Claims
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Jan 10, 2024
Letter accompanying subsequently filed items
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Jan 10, 2024
Nov 7, 2023
(Electronic) Receipt
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Nov 7, 2023
Oct 31, 2023
(Electronic) Receipt
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Oct 31, 2023
Letter accompanying subsequently filed items
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Oct 31, 2023
Oct 20, 2023
Oct 13, 2023
(Electronic) Receipt
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Oct 13, 2023
Annexes in respect of a client data request
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Oct 13, 2023
Letter accompanying subsequently filed items
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Oct 13, 2023
Jun 30, 2023
Annex to the communication
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Jun 30, 2023
Communication from the Examining Division
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Jun 27, 2023
Examination started
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Mar 22, 2023
Refund of fees
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Mar 21, 2023
Mar 10, 2023
(Electronic) Receipt
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Mar 10, 2023
Annexes in respect of a client data request
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Mar 10, 2023
Authorisation
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Mar 10, 2023
Letter accompanying subsequently filed items
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Mar 10, 2023
Nov 7, 2022
(Electronic) Receipt
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Nov 7, 2022
Nov 7, 2022
Amended claims with annotations
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Nov 7, 2022
Amendments received before examination
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Nov 7, 2022
Letter accompanying subsequently filed items
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May 13, 2022
Apr 25, 2022
Apr 25, 2022
European search opinion
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Apr 25, 2022
Information on Search Strategy
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Apr 25, 2022
Supplementary European search report
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Jan 21, 2022
Jan 21, 2022
Information on Search Strategy
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Jan 21, 2022
Partial European search report
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Jan 21, 2022
Jan 10, 2022
Search started
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Mar 31, 2021
Notification of forthcoming publication
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Jan 19, 2021
Jan 15, 2021
Communication to designated inventor
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Jan 15, 2021
Communication to designated inventor
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Jan 15, 2021
Communication to designated inventor
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Jan 15, 2021
Communication to designated inventor
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Jan 15, 2021
Communication to designated inventor
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Jan 15, 2021
Communication to designated inventor
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Jan 15, 2021
Communication to designated inventor
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Jan 15, 2021
Communication to designated inventor
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Jan 15, 2021
Communication to designated inventor
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Jan 15, 2021
Communication to designated inventor
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Jan 15, 2021
Communication to designated inventor
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Dec 14, 2020
Dec 14, 2020
Nov 30, 2020
(Electronic) Receipt
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Nov 30, 2020
Abstract
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Nov 30, 2020
Claims
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Nov 30, 2020
Description
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Nov 30, 2020
Drawings
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Nov 30, 2020
Request for entry into the European phase
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Oct 30, 2020
Notification of the recording of a change
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Oct 9, 2020
Information on entry into European phase
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Jan 2, 2020
Jan 2, 2020
Jan 2, 2020
Jan 2, 2020
Dec 5, 2019
Copy of the international search report
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Dec 5, 2019
Dec 5, 2019
International publication pamphlet
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