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The patent EP3356459 was granted to Basf on Sep 17, 2025. The application was filed on Sep 29, 2016 under application number EP16775671A. 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 |
|---|---|---|---|
| LANXESS DEUTSCHLAND | Aug 12, 2020 | - | - |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | DE1593368 |
| DESCRIPTION | DE1945359 |
| DESCRIPTION | DE2009505 |
| DESCRIPTION | DE2139630 |
| DESCRIPTION | DE2244373 |
| DESCRIPTION | DE2404855 |
| DESCRIPTION | DE2445303 |
| DESCRIPTION | DE2612355 |
| DESCRIPTION | DE2628987 |
| DESCRIPTION | DE3228881 |
| DESCRIPTION | DE4339713 |
| DESCRIPTION | EP0366089 |
| DESCRIPTION | EP0695734 |
| DESCRIPTION | EP0880494 |
| DESCRIPTION | EP1047655 |
| DESCRIPTION | EP1113034 |
| DESCRIPTION | EP1171413 |
| DESCRIPTION | EP1423476 |
| DESCRIPTION | RO104737 |
| DESCRIPTION | US2921089 |
| DESCRIPTION | US4148830 |
| DESCRIPTION | US4426524 |
| DESCRIPTION | US4623748 |
| DESCRIPTION | US5281647 |
| DESCRIPTION | US5288918 |
| DESCRIPTION | US5324853 |
| DESCRIPTION | US5434313 |
| DESCRIPTION | US6310235 |
| DESCRIPTION | WO0063151 |
| DESCRIPTION | WO0078704 |
| DESCRIPTION | WO0114297 |
| DESCRIPTION | WO0187809 |
| DESCRIPTION | WO02083695 |
| DESCRIPTION | WO03029339 |
| DESCRIPTION | WO2005028407 |
| DESCRIPTION | WO2009095126 |
| DESCRIPTION | WO9514647 |
| DESCRIPTION | WO9823566 |
| DESCRIPTION | WO9932427 |
| INTERNATIONAL-SEARCH-REPORT | EP1113034 |
| INTERNATIONAL-SEARCH-REPORT | EP1813645 |
| INTERNATIONAL-SEARCH-REPORT | US2014221593 |
| INTERNATIONAL-SEARCH-REPORT | WO2008154153 |
| INTERNATIONAL-SEARCH-REPORT | WO2016026838 |
| OPPOSITION | DE102008033834 |
| OPPOSITION | EP2032359 |
| OPPOSITION | EP3183291 |
| OPPOSITION | EP3356456 |
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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Aug 21, 2025
Aug 21, 2025
Jul 15, 2025
Jul 15, 2025
Jul 15, 2025
Jul 15, 2025
May 15, 2025
May 15, 2025
May 9, 2025
Refund of fees
Appeal
May 8, 2025
May 8, 2025
May 7, 2025
May 2, 2025
May 2, 2025
May 2, 2025
Apr 14, 2025
Apr 11, 2025
(Electronic) Receipt
Appeal
Apr 11, 2025
Apr 11, 2025
Mar 3, 2025
Feb 28, 2025
(Electronic) Receipt
Appeal
Feb 28, 2025
Feb 28, 2025
Feb 28, 2025
Feb 28, 2025
Nov 19, 2024
Nov 19, 2024
Aug 29, 2024
Aug 29, 2024
Aug 29, 2024
Aug 26, 2024
(Electronic) Receipt
Appeal
Aug 26, 2024
Aug 26, 2024
Aug 2, 2024
Jul 30, 2024
(Electronic) Receipt
Appeal
Jul 30, 2024
Jul 30, 2024
Jun 26, 2024
Jun 26, 2024
Jun 26, 2024
Jun 26, 2024
Jun 25, 2024
Jun 24, 2024
Dec 21, 2023
Dec 15, 2023
(Electronic) Receipt
Appeal
Dec 15, 2023
Dec 15, 2023
Reply to appeal
Appeal
Aug 9, 2023
Aug 4, 2023
(Electronic) Receipt
Appeal
Aug 4, 2023
Aug 4, 2023
Aug 4, 2023
Aug 4, 2023
Jun 21, 2023
Jun 21, 2023
Jun 14, 2023
(Electronic) Receipt
Appeal
Jun 14, 2023
Jun 14, 2023
Notice of appeal
Appeal
Apr 12, 2023
Apr 4, 2023
Apr 4, 2023
Apr 4, 2023
Apr 4, 2023
Apr 4, 2023
Apr 4, 2023
Apr 4, 2023
Apr 4, 2023
Means of redress
OPPO
Apr 4, 2023
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Nov 24, 2022
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Dec 14, 2020
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Aug 27, 2020
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Aug 12, 2020
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Aug 12, 2020
Aug 12, 2020
Aug 12, 2020
Nov 25, 2019
Oct 17, 2019
Decision to grant a European patent
Search/Exam
Sep 23, 2019
(Electronic) Receipt
Search/Exam
Sep 23, 2019
English translation of the claims
Search/Exam
Sep 23, 2019
Filing of the translations of the claims
Search/Exam
Sep 23, 2019
French translation of claims
Search/Exam
Jun 25, 2019
Jun 25, 2019
Jun 25, 2019
Intention to grant (signatures)
Search/Exam
Jun 25, 2019
Text intended for grant (clean copy)
Search/Exam
Jun 25, 2019
May 14, 2019
Examination started
Search/Exam
Oct 16, 2018
(Electronic) Receipt
Search/Exam
Oct 16, 2018
Letter accompanying subsequently filed items
Search/Exam
Oct 16, 2018
Reply to Written Opinion prepared by the EPO
Search/Exam
Jul 11, 2018
May 14, 2018
May 9, 2018
Communication to designated inventor
Search/Exam
May 9, 2018
Communication to designated inventor
Search/Exam
May 9, 2018
Communication to designated inventor
Search/Exam
May 9, 2018
Communication to designated inventor
Search/Exam
Apr 9, 2018
Apr 9, 2018
Mar 14, 2018
(Electronic) Receipt
Search/Exam
Mar 14, 2018
Request for entry into the European phase
Search/Exam
Feb 9, 2018
Information on entry into European phase
Search/Exam
Aug 29, 2017
Aug 29, 2017
Aug 29, 2017
Aug 29, 2017
Aug 29, 2017
Jul 11, 2017
Jul 11, 2017
Jul 11, 2017
Jul 11, 2017
Notification of the recording of a change
Search/Exam
Jun 29, 2017
Jun 28, 2017
May 15, 2017
Notification of election of EPO
Search/Exam
May 4, 2017
Apr 25, 2017
Apr 25, 2017
PCT demand form
PCT2
Apr 25, 2017
Apr 25, 2017
Apr 25, 2017
Apr 25, 2017
Apr 25, 2017
Apr 6, 2017
Copy of the international search report
Search/Exam
Apr 6, 2017
Copy of the international search report
Search/Exam
Apr 6, 2017
Published international application - A1
Search/Exam
Nov 30, 2016
ISR: cited documents
PCTISA
Nov 30, 2016
Nov 29, 2016
Nov 29, 2016
Nov 29, 2016
Oct 18, 2016
Oct 6, 2016
Oct 4, 2016
Sep 29, 2016
(Electronic) Receipt
PCTRO
Sep 29, 2016
Abstract
PCTRO
Sep 29, 2016
Claims
PCTRO
Sep 29, 2016
Description
PCTRO
Sep 29, 2016
Sep 29, 2016
Drawings
PCTRO
Sep 29, 2016
Sep 29, 2016