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The patent EP3129225 was granted to DOW on Apr 13, 2022. The application was filed on Apr 9, 2014 under application number EP14888731A. 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 |
|---|---|---|---|
| TOTALENERGIES ONE TECH | Apr 21, 2022 | SYNERGY GROUP | ADMISSIBLE |
| SABIC SABIC PETROCHEMICALS | Apr 20, 2022 | SABIC GROUP | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US2009286024 |
| DESCRIPTION | US5272236 |
| DESCRIPTION | US5278272 |
| DESCRIPTION | US5380810 |
| DESCRIPTION | WO2005090425 |
| DESCRIPTION | WO2005090426 |
| DESCRIPTION | WO2005090427 |
| EXAMINATION | US2009011263 |
| EXAMINATION | US2010209640 |
| INTERNATIONAL-SEARCH-REPORT | CN102066466 |
| INTERNATIONAL-SEARCH-REPORT | US2009011263 |
| INTERNATIONAL-SEARCH-REPORT | US2010209640 |
| OPPOSITION | EP0319258 |
| OPPOSITION | EP0405916 |
| OPPOSITION | GB2097324 |
| OPPOSITION | JP2009007589 |
| OPPOSITION | US2003144426 |
| OPPOSITION | US7078467 |
| OPPOSITION | WO03000782 |
| OPPOSITION | WO2009097222 |
| OPPOSITION | WO2010115677 |
| OPPOSITION | WO2012005974 |
| OPPOSITION | WO2014043364 |
| SEARCH | US2009286024 |
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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Dec 22, 2025
Dec 22, 2025
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Dec 17, 2025
Sep 29, 2025
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Sep 23, 2025
(Electronic) Receipt
Appeal
Sep 23, 2025
Sep 23, 2025
Reply to appeal
Appeal
Jun 2, 2025
Jun 2, 2025
May 27, 2025
(Electronic) Receipt
Appeal
May 27, 2025
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Mar 28, 2025
(Electronic) Receipt
Appeal
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Reply to appeal
Appeal
Dec 2, 2024
Refund of fees
Appeal
Nov 29, 2024
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Nov 26, 2024
(Electronic) Receipt
Appeal
Nov 26, 2024
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(Electronic) Receipt
Appeal
Nov 25, 2024
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Withdrawal of an appeal
Appeal
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(Electronic) Receipt
Appeal
Sep 24, 2024
(Electronic) Receipt
Appeal
Sep 24, 2024
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Notice of appeal
Appeal
Sep 24, 2024
Notice of appeal
Appeal
Sep 24, 2024
Notice of appeal
Appeal
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OPPO
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Search/Exam
Mar 7, 2022
Letter accompanying subsequently filed items
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Mar 7, 2022
Request for correction
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Decision to grant a European patent
Search/Exam
Jun 15, 2021
(Electronic) Receipt
Search/Exam
Jun 15, 2021
Filing of the translations of the claims
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Jun 15, 2021
French translation of claims
Search/Exam
Jun 15, 2021
German translation of the claims
Search/Exam
Jun 15, 2021
Letter accompanying subsequently filed items
Search/Exam
Feb 17, 2021
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Intention to grant (signatures)
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Feb 17, 2021
Text intended for grant (clean copy)
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Feb 17, 2021
Sep 4, 2020
(Electronic) Receipt
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Sep 4, 2020
Amended description with annotations
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Sep 4, 2020
Description
Search/Exam
Sep 4, 2020
Letter accompanying subsequently filed items
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Sep 4, 2020
Aug 20, 2020
Aug 17, 2020
(Electronic) Receipt
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Aug 17, 2020
Letter accompanying subsequently filed items
Search/Exam
Aug 17, 2020
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Annex to the communication
Search/Exam
Apr 15, 2020
Communication from the Examining Division
Search/Exam
Mar 17, 2020
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Examination started
Search/Exam
Mar 5, 2020
Letter accompanying subsequently filed items
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Submission concerning representation
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Mar 11, 2019
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Sep 25, 2018
(Electronic) Receipt
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Amended claims with annotations
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Sep 25, 2018
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Sep 25, 2018
Letter accompanying subsequently filed items
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Jul 3, 2018
Submission concerning representation
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European search opinion
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Information on Search Strategy
Search/Exam
Feb 26, 2018
Supplementary European search report
Search/Exam
Jan 23, 2018
Amendments not yet acceptable
Search/Exam
Jan 15, 2018
(Electronic) Receipt
Search/Exam
Jan 15, 2018
Jan 15, 2018
Amended claims with annotations
Search/Exam
Jan 15, 2018
Letter accompanying subsequently filed items
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Jan 15, 2018
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Annex to the communication
Search/Exam
Nov 15, 2017
Nov 9, 2017
Search started
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Refund of fees
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Refund of fees
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Nov 22, 2016
Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Nov 22, 2016
Communication to designated inventor
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Nov 14, 2016
(Electronic) Receipt
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Nov 14, 2016
Letter accompanying subsequently filed items
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Nov 14, 2016
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(Electronic) Receipt
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Nov 4, 2016
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Amended claims with annotations
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Nov 4, 2016
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Request for entry into the European phase
Search/Exam
Sep 27, 2016
Notification of the recording of a change
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Sep 22, 2016
Notification of the recording of a change
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Aug 19, 2016
Information on entry into European phase
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Oct 15, 2015
Copy of the international search report
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Oct 15, 2015
Copy of the international search report
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Oct 15, 2015
Published international application - A1
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Oct 15, 2015
Published international application - A9
Search/Exam