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The patent EP3939444 was granted to Daicel on Sep 6, 2023. The application was filed on Jul 13, 2021 under application number EP21185285A. 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 |
|---|---|---|---|
| CERDIA | Jun 5, 2024 | MEISSNER BOLTE PARTNERSCHAFT MBB | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | JP2015503335 |
| EXAMINATION | WO2021117113 |
| SEARCH | EP2075261 |
| SEARCH | EP2883906 |
| SEARCH | JP2019044102 |
| SEARCH | US2014305448 |
| SEARCH | WO2019165084 |
| SEARCH | WO2020035964 |
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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Sep 19, 2023
Aug 10, 2023
Decision to grant a European patent
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Jul 6, 2023
(Electronic) Receipt
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Jul 6, 2023
Filing of the translations of the claims
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Jul 6, 2023
French translation of claims
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Jul 6, 2023
German translation of the claims
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Apr 21, 2023
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Intention to grant (signatures)
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Apr 21, 2023
Text intended for grant (clean copy)
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Apr 21, 2023
Nov 16, 2022
(Electronic) Receipt
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Nov 16, 2022
Letter accompanying subsequently filed items
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Nov 16, 2022
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Annex to the communication
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Oct 25, 2022
Communication from the Examining Division
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Jun 10, 2022
(Electronic) Receipt
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Jun 10, 2022
Amended claims with annotations
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Jun 10, 2022
Amended description with annotations
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Jun 10, 2022
Annex
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Jun 10, 2022
Annex
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Jun 10, 2022
Claims
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Jun 10, 2022
Description
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Jun 10, 2022
Letter accompanying subsequently filed items
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Jun 10, 2022
May 6, 2022
Annex to the communication
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May 6, 2022
Communication from the Examining Division
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May 2, 2022
Examination started
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Feb 2, 2022
(Electronic) Receipt
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Amended claims with annotations
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Feb 2, 2022
Amendments received before examination
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Feb 2, 2022
Letter accompanying subsequently filed items
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Notification of forthcoming publication
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Nov 19, 2021
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European search opinion
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Nov 19, 2021
European search report
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Nov 19, 2021
Information on Search Strategy
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Nov 4, 2021
Search started
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Aug 11, 2021
Jul 13, 2021
Abstract
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Jul 13, 2021
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Claims
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Jul 13, 2021
Description
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Jul 13, 2021
Designation of inventor
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Jul 13, 2021
Request for grant of a European patent
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