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The patent EP3186051 was granted to Basell Polyolefine on Aug 6, 2025. The application was filed on Dec 3, 2015 under application number EP15804488A. 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 |
|---|---|---|---|
| TOTALENERGIES ONE TECH BELGIUM | Jan 11, 2019 | RABOIN | ADMISSIBLE |
| CHEVRON PHILLIPS CHEMICAL LP | Jan 10, 2019 | ABEL & IMRAY | ADMISSIBLE |
| THE DOW CHEMICAL | Jan 4, 2019 | BOULT WADE TENNANT | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | EP0238796 |
| INTERNATIONAL-SEARCH-REPORT | EP0881237 |
| INTERNATIONAL-SEARCH-REPORT | EP2016995 |
| INTERNATIONAL-SEARCH-REPORT | EP2030757 |
| INTERNATIONAL-SEARCH-REPORT | US4448736 |
| INTERNATIONAL-SEARCH-REPORT | US4510271 |
| INTERNATIONAL-SEARCH-REPORT | US6492485 |
| INTERNATIONAL-SEARCH-REPORT | WO2011058861 |
| OPPOSITION | US2003096901 |
| OPPOSITION | US2004020272 |
| OPPOSITION | US2006063896 |
| OPPOSITION | US2006287442 |
| OPPOSITION | US2011124545 |
| OPPOSITION | US2013099424 |
| OPPOSITION | US3638916 |
| OPPOSITION | US4448736 |
| OPPOSITION | US5314579 |
| OPPOSITION | US6254374 |
| OPPOSITION | US8543242 |
| OPPOSITION | WO0035646 |
| OPPOSITION | WO2004004996 |
| OPPOSITION | WO2005068516 |
| OPPOSITION | WO2011101438 |
| OPPOSITION | WO2015101668 |
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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Jul 4, 2025
Jun 23, 2025
(Electronic) Receipt
Search/Exam
Jun 23, 2025
Annex
Search/Exam
Jun 23, 2025
Annex
Search/Exam
Jun 23, 2025
Letter accompanying subsequently filed items
Search/Exam
Jun 23, 2025
Request for correction of the publication
Search/Exam
Apr 3, 2025
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(Electronic) Receipt
Appeal
Sep 12, 2024
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Aug 23, 2024
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Aug 7, 2024
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Appeal
Aug 7, 2024
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Jul 24, 2024
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Appeal
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(Electronic) Receipt
Appeal
Jul 1, 2024
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(Electronic) Receipt
Appeal
Feb 8, 2024
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(Electronic) Receipt
Appeal
Nov 14, 2023
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(Electronic) Receipt
Appeal
Aug 4, 2023
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(Electronic) Receipt
Appeal
Jul 6, 2023
(Electronic) Receipt
Appeal
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Authorisation
Appeal
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Authorisation
Appeal
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Authorisation
Appeal
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Appeal
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Reply to appeal
Appeal
Aug 23, 2022
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(Electronic) Receipt
Appeal
Aug 12, 2022
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Appeal
Jun 24, 2022
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Notice of appeal
Appeal
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OPPO
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OPPO
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Mar 15, 2018
Decision to grant a European patent
Search/Exam
Mar 6, 2018
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Intention to grant (signatures)
Search/Exam
Mar 6, 2018
Text intended for grant (clean copy)
Search/Exam
Mar 6, 2018
Mar 1, 2018
Feb 13, 2018
(Electronic) Receipt
Search/Exam
Feb 13, 2018
Amended description with annotations
Search/Exam
Feb 13, 2018
Description
Search/Exam
Feb 13, 2018
French translation of claims
Search/Exam
Feb 13, 2018
German translation of the claims
Search/Exam
Feb 13, 2018
Letter accompanying subsequently filed items
Search/Exam
Jan 25, 2018
Jan 25, 2018
Jan 25, 2018
Intention to grant (signatures)
Search/Exam
Jan 25, 2018
Text intended for grant (clean copy)
Search/Exam
Jan 25, 2018
Nov 27, 2017
(Electronic) Receipt
Search/Exam
Nov 27, 2017
Amended claims with annotations
Search/Exam
Nov 27, 2017
Amended description with annotations
Search/Exam
Nov 27, 2017
Claims
Search/Exam
Nov 27, 2017
Description
Search/Exam
Nov 27, 2017
Letter accompanying subsequently filed items
Search/Exam
Nov 27, 2017
Nov 8, 2017
Annex to the communication
Search/Exam
Nov 8, 2017
Communication from the Examining Division
Search/Exam
Nov 2, 2017
Examination started
Search/Exam
Jul 7, 2017
Communication to designated inventor
Search/Exam
Jul 7, 2017
Communication to designated inventor
Search/Exam
Jul 7, 2017
Communication to designated inventor
Search/Exam
Jul 7, 2017
Communication to designated inventor
Search/Exam
Jun 19, 2017
Jun 8, 2017
Apr 7, 2017
Priority search results copy provided by EPO
Search/Exam
Mar 27, 2017
(Electronic) Receipt
Search/Exam
Mar 27, 2017
Mar 27, 2017
Amended claims with annotations
Search/Exam
Mar 27, 2017
Mar 27, 2017
Amended description with annotations
Search/Exam
Mar 27, 2017
Amendments received before examination
Search/Exam
Mar 27, 2017
Request for entry into the European phase
Search/Exam
Jun 28, 2016
Jun 9, 2016
Copy of the international search report
Search/Exam
Jun 9, 2016
Published international application - A1
Search/Exam
Mar 11, 2016
ISR: cited documents
PCTISA
Mar 10, 2016
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Dec 17, 2015
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Dec 3, 2015
(Electronic) Receipt
PCTRO
Dec 3, 2015
Abstract
PCTRO
Dec 3, 2015
Claims
PCTRO
Dec 3, 2015
Description
PCTRO
Dec 3, 2015
Dec 3, 2015
Drawings
PCTRO
Dec 3, 2015
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