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The patent EP3794071 was granted to Basell Polyolefine on Jan 26, 2022. The application was originally filed on May 14, 2019 under application number EP19724779A. 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.
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | EP0395083 |
| DESCRIPTION | US4399054 |
| DESCRIPTION | US4469648 |
| DESCRIPTION | US4829034 |
| DESCRIPTION | US5100849 |
| DESCRIPTION | US6201078 |
| DESCRIPTION | WO2005019280 |
| DESCRIPTION | WO9844009 |
| INTERNATIONAL-SEARCH-REPORT | WO2014134193 |
| INTERNATIONAL-SEARCH-REPORT | WO2014206854 |
| INTERNATIONAL-SEARCH-REPORT | WO2016206958 |
| OPPOSITION | EP1460105 |
| OPPOSITION | US4399905 |
| OPPOSITION | WO2008131817 |
| OPPOSITION | WO2015096900 |
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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Annex
OPPO
Jun 25, 2025
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Feb 8, 2022
Jan 7, 2022
Decision to grant a European patent
Search/Exam
Dec 29, 2021
Letter accompanying subsequently filed items
Search/Exam
Dec 29, 2021
Letter concerning the inventor
Search/Exam
Dec 21, 2021
(Electronic) Receipt
Search/Exam
Dec 21, 2021
French translation of claims
Search/Exam
Dec 21, 2021
German translation of the claims
Search/Exam
Dec 21, 2021
Letter accompanying subsequently filed items
Search/Exam
Sep 13, 2021
Sep 13, 2021
Sep 13, 2021
Intention to grant (signatures)
Search/Exam
Sep 13, 2021
Text intended for grant (clean copy)
Search/Exam
Sep 13, 2021
Aug 25, 2021
Examination started
Search/Exam
Jun 17, 2021
(Electronic) Receipt
Search/Exam
Jun 17, 2021
Amended description with annotations
Search/Exam
Jun 17, 2021
Amendments received before examination
Search/Exam
Jun 17, 2021
Description
Search/Exam
Jun 17, 2021
Letter accompanying subsequently filed items
Search/Exam
Feb 24, 2021
Dec 22, 2020
Dec 18, 2020
Communication to designated inventor
Search/Exam
Dec 18, 2020
Communication to designated inventor
Search/Exam
Dec 18, 2020
Communication to designated inventor
Search/Exam
Dec 18, 2020
Communication to designated inventor
Search/Exam
Dec 18, 2020
Communication to designated inventor
Search/Exam
Dec 15, 2020
Priority search results copy provided by EPO
Search/Exam
Nov 30, 2020
Nov 16, 2020
(Electronic) Receipt
Search/Exam
Nov 16, 2020
Request for entry into the European phase
Search/Exam
Sep 25, 2020
Information on entry into European phase
Search/Exam
Sep 15, 2020
Sep 15, 2020
Notification of the recording of a change
Search/Exam
Jun 15, 2020
(Electronic) Receipt
PCTRO
Jun 15, 2020
Dec 9, 2019
Nov 21, 2019
Copy of the international search report
Search/Exam
Nov 21, 2019
Published international application - A1
Search/Exam
Aug 29, 2019
ISR: cited documents
PCTISA
Aug 29, 2019
Aug 29, 2019
Aug 29, 2019
May 31, 2019
May 29, 2019
May 24, 2019
May 14, 2019
(Electronic) Receipt
PCTRO
May 14, 2019
Abstract
PCTRO
May 14, 2019
Claims
PCTRO
May 14, 2019
Description
PCTRO
May 14, 2019
May 14, 2019
Drawings
PCTRO
May 14, 2019
May 14, 2019