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The patent EP3371234 was granted to Basf on Mar 29, 2023. The application was filed on Oct 14, 2016 under application number EP16781467A. 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 LUBRIZOL | Dec 18, 2023 | D YOUNG | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | EP1213307 |
| DESCRIPTION | EP1846465 |
| EXAMINATION | EP1801141 |
| EXAMINATION | WO03099875 |
| EXAMINATION | WO2015063062 |
| INTERNATIONAL-SEARCH-REPORT | DE69516978T |
| INTERNATIONAL-SEARCH-REPORT | EP1422259 |
| INTERNATIONAL-SEARCH-REPORT | WO03099875 |
| INTERNATIONAL-SEARCH-REPORT | WO2009023131 |
| INTERNATIONAL-SEARCH-REPORT | WO2015063062 |
| OPPOSITION | WO2008153791 |
| OPPOSITION | WO2015121505 |
| OPPOSITION | WO2016144676 |
| OPPOSITION | WO2017076609 |
| SEARCH | DE69516978T |
| SEARCH | EP1422259 |
| SEARCH | WO2009023131 |
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 15, 2025
Oct 10, 2025
(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
Aug 7, 2025
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Notice of appeal
Appeal
Jun 10, 2025
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Means of redress
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Letter accompanying subsequently filed items
Search/Exam
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Decision to grant a European patent
Search/Exam
Feb 16, 2023
(Electronic) Receipt
Search/Exam
Feb 16, 2023
English translation of the claims
Search/Exam
Feb 16, 2023
Filing of the translations of the claims
Search/Exam
Feb 16, 2023
French translation of claims
Search/Exam
Nov 15, 2022
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(Electronic) Receipt
Search/Exam
Nov 8, 2022
Letter accompanying subsequently filed items
Search/Exam
Nov 8, 2022
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Intention to grant (signatures)
Search/Exam
Oct 25, 2022
Text intended for grant (clean copy)
Search/Exam
Oct 25, 2022
Mar 29, 2021
(Electronic) Receipt
Search/Exam
Mar 29, 2021
Amended claims with annotations
Search/Exam
Mar 29, 2021
Amended description with annotations
Search/Exam
Mar 29, 2021
Claims
Search/Exam
Mar 29, 2021
Description
Search/Exam
Mar 29, 2021
Letter accompanying subsequently filed items
Search/Exam
Mar 29, 2021
Nov 24, 2020
Annex to the communication
Search/Exam
Nov 24, 2020
Communication from the Examining Division
Search/Exam
Jul 8, 2020
(Electronic) Receipt
Search/Exam
Jul 8, 2020
Amended claims with annotations
Search/Exam
Jul 8, 2020
Claims
Search/Exam
Jul 8, 2020
Letter accompanying subsequently filed items
Search/Exam
Jul 8, 2020
Feb 27, 2020
Annex to the communication
Search/Exam
Feb 27, 2020
Communication from the Examining Division
Search/Exam
Oct 16, 2019
(Electronic) Receipt
Search/Exam
Oct 16, 2019
Amended claims with annotations
Search/Exam
Oct 16, 2019
Claims
Search/Exam
Oct 16, 2019
Letter accompanying subsequently filed items
Search/Exam
Oct 16, 2019
Jun 14, 2019
Submission concerning representation
Search/Exam
Jun 6, 2019
Annex to the communication
Search/Exam
Jun 6, 2019
Communication from the Examining Division
Search/Exam
May 29, 2019
Examination started
Search/Exam
Jan 14, 2019
(Electronic) Receipt
Search/Exam
Jan 14, 2019
Letter accompanying subsequently filed items
Search/Exam
Jan 14, 2019
Reply to Written Opinion prepared by the EPO
Search/Exam
Aug 16, 2018
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Priority search results copy provided by EPO
Search/Exam
Jun 12, 2018
Communication to designated inventor
Search/Exam
Jun 12, 2018
Communication to designated inventor
Search/Exam
Jun 1, 2018
(Electronic) Receipt
Search/Exam
Jun 1, 2018
Request for entry into the European phase
Search/Exam
May 16, 2018
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Notification of the recording of a change
Search/Exam
Apr 18, 2018
Notification of the recording of a change
Search/Exam
Mar 29, 2018
(Electronic) Receipt
PCTRO
Mar 29, 2018
Mar 16, 2018
Information on entry into European phase
Search/Exam
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Written opinion
PCT2
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PCT demand form
PCT2
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Copy of the international search report
Search/Exam
May 11, 2017
Published international application - A1
Search/Exam
Jan 18, 2017
ISR: cited documents
PCTISA
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Oct 20, 2016
Oct 14, 2016
(Electronic) Receipt
PCTRO
Oct 14, 2016
Abstract
PCTRO
Oct 14, 2016
Claims
PCTRO
Oct 14, 2016
Description
PCTRO
Oct 14, 2016
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