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The patent EP3237458 was granted to Sabic on Apr 2, 2025. The application was filed on Dec 22, 2015 under application number EP15817345A. The patent is currently recorded with a legal status of "Patent Maintained As Amended".

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 |
|---|---|---|---|
| THE DOW CHEMICAL | Mar 17, 2023 | BECK GREENER | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | EP1731535 |
| INTERNATIONAL-SEARCH-REPORT | EP2216347 |
| INTERNATIONAL-SEARCH-REPORT | EP2610269 |
| INTERNATIONAL-SEARCH-REPORT | JP2003064105 |
| INTERNATIONAL-SEARCH-REPORT | US2001020072 |
| INTERNATIONAL-SEARCH-REPORT | US2006160965 |
| INTERNATIONAL-SEARCH-REPORT | US5672666 |
| OPPOSITION | EP0696293 |
| OPPOSITION | EP1316566 |
| OPPOSITION | EP1731535 |
| OPPOSITION | EP2216347 |
| OPPOSITION | EP2610269 |
| OPPOSITION | JP2003064105 |
| OPPOSITION | US2001020072 |
| OPPOSITION | US2002173601 |
| OPPOSITION | US2006160965 |
| OPPOSITION | US4543399 |
| OPPOSITION | US4588790 |
| OPPOSITION | US5442019 |
| OPPOSITION | US5595950 |
| OPPOSITION | US5672666 |
| OPPOSITION | US6833417 |
| OPPOSITION | US6897269 |
| OPPOSITION | WO0177190 |
| OPPOSITION | WO2004060921 |
| OPPOSITION | WO2004111097 |
| OPPOSITION | WO2007059867 |
| OPPOSITION | WO2010072367 |
| OPPOSITION | WO2013101541 |
| OPPOSITION | WO9732905 |
| OPPOSITION | WO9961486 |
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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Mar 6, 2025
Mar 6, 2025
Feb 24, 2025
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Feb 10, 2025
Refund of fees
Appeal
Feb 7, 2025
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(Electronic) Receipt
Appeal
Jan 31, 2025
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Withdrawal of an appeal
Appeal
Jan 16, 2025
Jan 13, 2025
(Electronic) Receipt
Appeal
Jan 13, 2025
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Dec 5, 2024
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Dec 2, 2024
(Electronic) Receipt
Appeal
Dec 2, 2024
Dec 2, 2024
Notice of appeal
Appeal
Oct 1, 2024
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Jul 5, 2022
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Decision to grant a European patent
Search/Exam
May 13, 2022
(Electronic) Receipt
Search/Exam
May 13, 2022
Filing of the translations of the claims
Search/Exam
May 13, 2022
French translation of claims
Search/Exam
May 13, 2022
German translation of the claims
Search/Exam
Apr 25, 2022
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Intention to grant (signatures)
Search/Exam
Apr 25, 2022
Text intended for grant (clean copy)
Search/Exam
Apr 25, 2022
Feb 17, 2022
(Electronic) Receipt
Search/Exam
Feb 17, 2022
Letter accompanying subsequently filed items
Search/Exam
Feb 17, 2022
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Intention to grant (signatures)
Search/Exam
Jan 28, 2022
Text intended for grant (clean copy)
Search/Exam
Jan 28, 2022
Feb 20, 2019
(Electronic) Receipt
Search/Exam
Feb 20, 2019
Letter accompanying subsequently filed items
Search/Exam
Feb 20, 2019
Oct 22, 2018
Annex to the communication
Search/Exam
Oct 22, 2018
Communication from the Examining Division
Search/Exam
Oct 16, 2018
Examination started
Search/Exam
Jan 23, 2018
(Electronic) Receipt
Search/Exam
Jan 23, 2018
Letter accompanying subsequently filed items
Search/Exam
Jan 23, 2018
Reply to Written Opinion prepared by the EPO
Search/Exam
Oct 5, 2017
Jul 28, 2017
Jul 26, 2017
Communication to designated inventor
Search/Exam
Jul 26, 2017
Communication to designated inventor
Search/Exam
Jul 26, 2017
Communication to designated inventor
Search/Exam
Jul 22, 2017
Priority search results copy provided by EPO
Search/Exam
Jul 21, 2017
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Jun 16, 2017
(Electronic) Receipt
Search/Exam
Jun 16, 2017
Request for entry into the European phase
Search/Exam
May 8, 2017
Information on entry into European phase
Search/Exam
Jun 30, 2016
Copy of the international search report
Search/Exam
Jun 30, 2016
Published international application - A1
Search/Exam
Apr 20, 2016
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Jan 11, 2016
Dec 22, 2015
(Electronic) Receipt
PCTRO
Dec 22, 2015
Abstract
PCTRO
Dec 22, 2015
Claims
PCTRO
Dec 22, 2015
Description
PCTRO
Dec 22, 2015
Dec 22, 2015
Drawings
PCTRO
Dec 22, 2015