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The patent EP3668904 was granted to Basell Polyolefine on Jun 9, 2021. The application was filed on Aug 16, 2018 under application number EP18752506A. 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 |
|---|---|---|---|
| THE DOW CHEMICAL | Mar 9, 2022 | BOULT WADE TENNANT | - |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | WO2007018871 |
| DESCRIPTION | WO2007051561 |
| DESCRIPTION | WO2012084772 |
| INTERNATIONAL-SEARCH-REPORT | US2007032614 |
| INTERNATIONAL-SEARCH-REPORT | US2011275770 |
| INTERNATIONAL-SEARCH-REPORT | US2011294967 |
| OPPOSITION | US4175169 |
| OPPOSITION | WO2013132011 |
| OPPOSITION | WO2019005812 |
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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Oct 1, 2025
Sep 26, 2025
(Electronic) Receipt
Appeal
Sep 26, 2025
Sep 26, 2025
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Aug 14, 2025
Aug 12, 2025
(Electronic) Receipt
Appeal
Aug 12, 2025
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Aug 6, 2025
(Electronic) Receipt
Appeal
Aug 6, 2025
Aug 1, 2025
Jul 30, 2025
(Electronic) Receipt
Appeal
Jul 30, 2025
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Jul 16, 2025
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Jul 11, 2025
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Sep 25, 2024
Sep 20, 2024
(Electronic) Receipt
Appeal
Sep 20, 2024
Sep 20, 2024
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Jul 18, 2024
(Electronic) Receipt
Appeal
Jul 18, 2024
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Reply to appeal
Appeal
Mar 20, 2024
Mar 15, 2024
(Electronic) Receipt
Appeal
Mar 15, 2024
Mar 15, 2024
Jan 18, 2024
Jan 18, 2024
Jan 12, 2024
(Electronic) Receipt
Appeal
Jan 12, 2024
Jan 12, 2024
Notice of appeal
Appeal
Nov 21, 2023
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Means of redress
OPPO
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Aug 9, 2021
Payment submission rejected
Search/Exam
Jun 22, 2021
May 14, 2021
Decision to grant a European patent
Search/Exam
Apr 27, 2021
(Electronic) Receipt
Search/Exam
Apr 27, 2021
Filing of the translations of the claims
Search/Exam
Apr 27, 2021
French translation of claims
Search/Exam
Apr 27, 2021
German translation of the claims
Search/Exam
Mar 16, 2021
Mar 16, 2021
Mar 16, 2021
Text intended for grant (clean copy)
Search/Exam
Mar 16, 2021
Mar 15, 2021
Intention to grant (signatures)
Search/Exam
Feb 4, 2021
Examination started
Search/Exam
May 27, 2020
Mar 26, 2020
(Electronic) Receipt
Search/Exam
Mar 26, 2020
Letter accompanying subsequently filed items
Search/Exam
Mar 26, 2020
Reply to Written Opinion prepared by the EPO
Search/Exam
Mar 24, 2020
Mar 20, 2020
Communication to designated inventor
Search/Exam
Mar 20, 2020
Communication to designated inventor
Search/Exam
Mar 20, 2020
Communication to designated inventor
Search/Exam
Mar 20, 2020
Communication to designated inventor
Search/Exam
Mar 20, 2020
Communication to designated inventor
Search/Exam
Mar 20, 2020
Communication to designated inventor
Search/Exam
Mar 2, 2020
Feb 3, 2020
Jan 15, 2020
(Electronic) Receipt
Search/Exam
Jan 15, 2020
Request for entry into the European phase
Search/Exam
Jan 14, 2020
Jan 13, 2020
Jan 8, 2020
Information on entry into European phase
Search/Exam
Mar 13, 2019
Feb 21, 2019
Copy of the international search report
Search/Exam
Feb 21, 2019
Published international application - A1
Search/Exam
Oct 16, 2018
Oct 16, 2018
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Aug 22, 2018
Aug 16, 2018
(Electronic) Receipt
PCTRO
Aug 16, 2018
Abstract
PCTRO
Aug 16, 2018
Claims
PCTRO
Aug 16, 2018
Description
PCTRO
Aug 16, 2018
Aug 16, 2018
Drawings
PCTRO
Aug 16, 2018
Aug 16, 2018