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The patent EP3715519 was granted to Mitsui Chemicals on Nov 29, 2023. The application was filed on Aug 6, 2019 under application number EP19802023A. 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 |
|---|---|---|---|
| ANDRITZ KUSTERS | Aug 29, 2024 | KLUIN PATENT | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | WO2019JP02536 |
| DESCRIPTION | JP2015108213 |
| DESCRIPTION | JP2016005545 |
| DESCRIPTION | JP2016041858 |
| DESCRIPTION | JP229871 |
| DESCRIPTION | JPH01201567 |
| DESCRIPTION | JPS57167442 |
| DESCRIPTION | WO2007091444 |
| INTERNATIONAL-SEARCH-REPORT | JP2004113489 |
| INTERNATIONAL-SEARCH-REPORT | JP2015108213 |
| INTERNATIONAL-SEARCH-REPORT | JP2016005545 |
| INTERNATIONAL-SEARCH-REPORT | JP2016041858 |
| INTERNATIONAL-SEARCH-REPORT | JPH11347062 |
| INTERNATIONAL-SEARCH-REPORT | JPS57112454 |
| OPPOSITION | DE102012105163 |
| OPPOSITION | EP0379767 |
| OPPOSITION | JP2015108213 |
| OPPOSITION | JP2016041858 |
| OPPOSITION | US3803684 |
| OPPOSITION | WO03021024 |
| OPPOSITION | WO2017190717 |
| OPPOSITION | WO2020196663 |
| OPPOSITION | WO9847706 |
| OPPOSITION | WO9858109 |
| SEARCH | JP2015108213 |
| SEARCH | JP2016041858 |
| SEARCH | WO2020196663 |
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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Annexes in respect of a client data request
Search/Exam
Jan 30, 2024
Letter accompanying subsequently filed items
Search/Exam
Jan 30, 2024
Dec 12, 2023
Nov 3, 2023
Decision to grant a European patent
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Oct 23, 2023
(Electronic) Receipt
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Oct 23, 2023
Filing of the translations of the claims
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Oct 23, 2023
French translation of claims
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Oct 23, 2023
German translation of the claims
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Oct 23, 2023
Letter accompanying subsequently filed items
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Aug 16, 2023
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Intention to grant (signatures)
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Aug 16, 2023
Text intended for grant (clean copy)
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Aug 16, 2023
Jul 24, 2023
(Electronic) Receipt
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Jul 24, 2023
Amended claims with annotations
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Jul 24, 2023
Amended description with annotations
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Jul 24, 2023
Claims
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Jul 24, 2023
Description
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Jul 24, 2023
Letter accompanying subsequently filed items
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Jul 24, 2023
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Annex to the communication
Search/Exam
Mar 23, 2023
Annexes in respect of a client data request
Search/Exam
Mar 23, 2023
Communication from the Examining Division
Search/Exam
Mar 23, 2023
Letter accompanying subsequently filed items
Search/Exam
Mar 23, 2023
Aug 9, 2021
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Jul 27, 2021
(Electronic) Receipt
Search/Exam
Jul 27, 2021
Amended claims with annotations
Search/Exam
Jul 27, 2021
Amended description with annotations
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Jul 27, 2021
Claims
Search/Exam
Jul 27, 2021
Description
Search/Exam
Jul 27, 2021
Letter accompanying subsequently filed items
Search/Exam
Jul 27, 2021
Mar 19, 2021
Annex to the communication
Search/Exam
Mar 19, 2021
Communication from the Examining Division
Search/Exam
Mar 9, 2021
Mar 9, 2021
Information on Search Strategy
Search/Exam
Mar 9, 2021
Supplementary European search report
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Feb 25, 2021
Search started
Search/Exam
Sep 2, 2020
Notification of forthcoming publication
Search/Exam
Aug 17, 2020
Jul 30, 2020
Copy of the international search report
Search/Exam
Jul 30, 2020
Jul 30, 2020
International publication pamphlet
Search/Exam
Jan 31, 2020
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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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Jan 3, 2020
Communication to designated inventor
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Jan 3, 2020
Communication to designated inventor
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Jan 2, 2020
Dec 17, 2019
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Copy of the international search report
Search/Exam
Dec 17, 2019
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Dec 2, 2019
Enquiry with the International Bureau
Search/Exam
Nov 29, 2019
(Electronic) Receipt
Search/Exam
Nov 29, 2019
Letter accompanying subsequently filed items
Search/Exam
Nov 22, 2019
(Electronic) Receipt
Search/Exam
Nov 22, 2019
Abstract
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Nov 22, 2019
Claims
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Nov 22, 2019
Description
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Nov 22, 2019
Drawings
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Nov 22, 2019
Request for entry into the European phase
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