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The patent EP3161066 was granted to Basell Polyolefine on Nov 18, 2020. The application was filed on Jun 17, 2015 under application number EP15728901A. 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 | Aug 18, 2021 | BOULT WADE TENNANT | - |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US4298718 |
| DESCRIPTION | US4495338 |
| DESCRIPTION | US5534472 |
| DESCRIPTION | WO2004106388 |
| DESCRIPTION | WO9412568 |
| INTERNATIONAL-SEARCH-REPORT | US2005288443 |
| OPPOSITION | EP1332179 |
| OPPOSITION | US7300988 |
| OPPOSITION | US8344068 |
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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Nov 17, 2025
Nov 17, 2025
Nov 17, 2025
Nov 17, 2025
Sep 29, 2025
Sep 29, 2025
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Aug 26, 2025
Aug 22, 2025
(Electronic) Receipt
Appeal
Aug 22, 2025
Jul 25, 2025
Jul 22, 2025
(Electronic) Receipt
Appeal
Jul 22, 2025
Jul 22, 2025
Mar 10, 2025
Mar 5, 2025
(Electronic) Receipt
Appeal
Mar 5, 2025
Mar 5, 2025
Feb 28, 2025
Feb 28, 2025
Dec 20, 2024
Dec 20, 2024
Dec 20, 2024
Dec 16, 2024
(Electronic) Receipt
Appeal
Dec 16, 2024
Dec 16, 2024
Dec 11, 2024
Dec 11, 2024
Dec 10, 2024
(Electronic) Receipt
Appeal
Dec 10, 2024
Dec 6, 2024
(Electronic) Receipt
Appeal
Dec 6, 2024
Dec 6, 2024
Dec 6, 2024
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Dec 3, 2024
Dec 3, 2024
Feb 2, 2024
Jan 30, 2024
(Electronic) Receipt
Appeal
Jan 30, 2024
Jan 30, 2024
Jan 12, 2024
Jan 9, 2024
(Electronic) Receipt
Appeal
Jan 9, 2024
Jan 9, 2024
Jan 9, 2024
Jan 9, 2024
Jan 9, 2024
Jan 9, 2024
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Jan 9, 2024
Reply to appeal
Appeal
Aug 30, 2023
Aug 25, 2023
(Electronic) Receipt
Appeal
Aug 25, 2023
Aug 25, 2023
Aug 25, 2023
Jun 12, 2023
Jun 12, 2023
May 18, 2023
(Electronic) Receipt
Appeal
May 18, 2023
May 18, 2023
Notice of appeal
Appeal
Apr 17, 2023
Apr 17, 2023
Apr 17, 2023
Apr 17, 2023
Apr 17, 2023
Apr 17, 2023
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Apr 17, 2023
Means of redress
OPPO
Apr 17, 2023
Apr 17, 2023
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Aug 18, 2021
Aug 18, 2021
Aug 18, 2021
Aug 18, 2021
Nov 30, 2020
Oct 22, 2020
Decision to grant a European patent
Search/Exam
Oct 6, 2020
(Electronic) Receipt
Search/Exam
Oct 6, 2020
Filing of the translations of the claims
Search/Exam
Oct 6, 2020
French translation of claims
Search/Exam
Oct 6, 2020
German translation of the claims
Search/Exam
Sep 11, 2020
Change to the inventor details
Search/Exam
Jul 10, 2020
Jul 10, 2020
Jul 10, 2020
Intention to grant (signatures)
Search/Exam
Jul 10, 2020
Text intended for grant (clean copy)
Search/Exam
Jul 10, 2020
Jun 15, 2020
Letter accompanying subsequently filed items
Search/Exam
Jun 15, 2020
Letter concerning the inventor
Search/Exam
Feb 6, 2020
Feb 3, 2020
Jan 14, 2020
Jan 14, 2020
Jan 13, 2020
Jan 13, 2020
Feb 19, 2019
Note on telephone consultation
Search/Exam
Feb 14, 2019
(Electronic) Receipt
Search/Exam
Feb 14, 2019
Amended description with annotations
Search/Exam
Feb 14, 2019
Description
Search/Exam
Feb 14, 2019
Letter accompanying subsequently filed items
Search/Exam
Feb 14, 2019
Nov 8, 2018
Oct 24, 2018
Letter accompanying subsequently filed items
Search/Exam
Oct 24, 2018
Letter concerning the inventor
Search/Exam
Oct 17, 2018
Annex to the communication
Search/Exam
Oct 17, 2018
Communication from the Examining Division
Search/Exam
Sep 27, 2018
(Electronic) Receipt
Search/Exam
Sep 27, 2018
Letter accompanying subsequently filed items
Search/Exam
Sep 27, 2018
Aug 30, 2018
Letter accompanying subsequently filed items
Search/Exam
Aug 30, 2018
Letter concerning the inventor
Search/Exam
May 29, 2018
Annex to the communication
Search/Exam
May 29, 2018
Communication from the Examining Division
Search/Exam
May 23, 2018
Examination started
Search/Exam
Aug 1, 2017
(Electronic) Receipt
Search/Exam
Aug 1, 2017
Aug 1, 2017
Amended claims with annotations
Search/Exam
Aug 1, 2017
Aug 1, 2017
Amended description with annotations
Search/Exam
Aug 1, 2017
Amendments received before examination
Search/Exam
Aug 1, 2017
Letter accompanying subsequently filed items
Search/Exam
Apr 5, 2017
Jan 31, 2017
Jan 27, 2017
Communication to designated inventor
Search/Exam
Jan 27, 2017
Communication to designated inventor
Search/Exam
Jan 27, 2017
Communication to designated inventor
Search/Exam
Jan 27, 2017
Communication to designated inventor
Search/Exam
Jan 27, 2017
Communication to designated inventor
Search/Exam
Jan 27, 2017
Communication to designated inventor
Search/Exam
Jan 11, 2017
Nov 30, 2016
Information regarding early processing
Search/Exam
Nov 22, 2016
(Electronic) Receipt
Search/Exam
Nov 22, 2016
Request for entry into the European phase
Search/Exam
Nov 4, 2016
Information on entry into European phase
Search/Exam
Jan 19, 2016
Dec 30, 2015
Copy of the international search report
Search/Exam
Dec 30, 2015
Published international application - A1
Search/Exam
Jul 20, 2015
Jul 20, 2015
Jul 20, 2015
Jun 17, 2015
(Electronic) Receipt
PCTRO
Jun 17, 2015
Abstract
PCTRO
Jun 17, 2015
Claims
PCTRO
Jun 17, 2015
Description
PCTRO
Jun 17, 2015
Drawings
PCTRO