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The patent EP3666804 was granted to Borealis on Apr 5, 2023. The application was filed on Dec 14, 2018 under application number EP18212641A. 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 |
|---|---|---|---|
| BASELL POLIOLEFINE ITALIA | Jan 5, 2024 | LYONDELLBASELL | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | EP0129368 |
| DESCRIPTION | EP0260130 |
| DESCRIPTION | EP0423101 |
| DESCRIPTION | EP0537130 |
| DESCRIPTION | EP0887379 |
| DESCRIPTION | WO0034341 |
| DESCRIPTION | WO0068315 |
| DESCRIPTION | WO2004000899 |
| DESCRIPTION | WO2004111095 |
| DESCRIPTION | WO2013007650 |
| DESCRIPTION | WO2015011135 |
| DESCRIPTION | WO9212182 |
| DESCRIPTION | WO9728170 |
| DESCRIPTION | WO9846616 |
| DESCRIPTION | WO9849208 |
| DESCRIPTION | WO9856831 |
| DESCRIPTION | WO9912981 |
| DESCRIPTION | WO9919335 |
| DESCRIPTION | WO9924478 |
| DESCRIPTION | WO9924479 |
| OPPOSITION | WO2011128146 |
| OPPOSITION | WO2012031951 |
| OPPOSITION | WO2013127758 |
| OPPOSITION | WO2015117958 |
| OPPOSITION | WO2015139875 |
| OPPOSITION | WO2019215156 |
| SEARCH | EP2664650 |
| SEARCH | EP3064548 |
| SEARCH | WO2014180639 |
| SEARCH | WO2015022127 |
| SEARCH | WO2017097579 |
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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Annex
Search/Exam
Jun 24, 2025
Annexes in respect of a client data request
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Annexes in respect of a client data request
Search/Exam
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Annexes in respect of a client data request
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Jun 24, 2025
Letter accompanying subsequently filed items
Search/Exam
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Decision to grant a European patent
Search/Exam
Feb 23, 2023
(Electronic) Receipt
Search/Exam
Feb 23, 2023
French translation of claims
Search/Exam
Feb 23, 2023
German translation of the claims
Search/Exam
Feb 23, 2023
Letter accompanying subsequently filed items
Search/Exam
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Intention to grant (signatures)
Search/Exam
Nov 7, 2022
Text intended for grant (clean copy)
Search/Exam
Nov 7, 2022
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Document concerning representation
Search/Exam
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Letter accompanying subsequently filed items
Search/Exam
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(Electronic) Receipt
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Amended description with annotations
Search/Exam
Jan 21, 2022
Description
Search/Exam
Jan 21, 2022
Letter accompanying subsequently filed items
Search/Exam
Jan 21, 2022
Oct 27, 2021
Annex to the communication
Search/Exam
Oct 27, 2021
Communication from the Examining Division
Search/Exam
Oct 21, 2021
Examination started
Search/Exam
Oct 13, 2020
(Electronic) Receipt
Search/Exam
Oct 13, 2020
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Amended claims with annotations
Search/Exam
Oct 13, 2020
Amendments received before examination
Search/Exam
Oct 13, 2020
Letter accompanying subsequently filed items
Search/Exam
Jun 22, 2020
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Notification of forthcoming publication
Search/Exam
Jun 3, 2019
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European search opinion
Search/Exam
Jun 3, 2019
European search report
Search/Exam
Jun 3, 2019
Information on Search Strategy
Search/Exam
May 21, 2019
Search started
Search/Exam
Feb 6, 2019
Communication to designated inventor
Search/Exam
Feb 6, 2019
Communication to designated inventor
Search/Exam
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Communication to designated inventor
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Communication to designated inventor
Search/Exam
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Communication to designated inventor
Search/Exam
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Communication to designated inventor
Search/Exam
Dec 14, 2018
Abstract
Search/Exam
Dec 14, 2018
Dec 14, 2018
Claims
Search/Exam
Dec 14, 2018
Description
Search/Exam
Dec 14, 2018
Designation of inventor
Search/Exam
Dec 14, 2018
Request for grant of a European patent
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