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The patent EP3841166 was granted to Basf on May 7, 2025. The application was filed on Aug 19, 2019 under application number EP19765356A. 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 |
|---|---|---|---|
| CYTEC INDUSTRIES | Apr 20, 2023 | KRAUS & LEDERER PARTGMBB | ADMISSIBLE |
| GRAFE POLYMER SOLUTIONS | Apr 20, 2023 | GLEIM PETRI PATENT UND RECHTSANWALTSPARTNERSCHAFT MBB | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US2010029844 |
| DESCRIPTION | US2010048782 |
| DESCRIPTION | US2012238677 |
| DESCRIPTION | US2013225736 |
| DESCRIPTION | US2015284535 |
| DESCRIPTION | US3004896 |
| DESCRIPTION | US3055896 |
| DESCRIPTION | US3072585 |
| DESCRIPTION | US3074910 |
| DESCRIPTION | US3189615 |
| DESCRIPTION | US3218332 |
| DESCRIPTION | US3230194 |
| DESCRIPTION | US3843371 |
| DESCRIPTION | US4127586 |
| DESCRIPTION | US4226763 |
| DESCRIPTION | US4275004 |
| DESCRIPTION | US4278589 |
| DESCRIPTION | US4315848 |
| DESCRIPTION | US4325863 |
| DESCRIPTION | US4338244 |
| DESCRIPTION | US4347180 |
| DESCRIPTION | US4383863 |
| DESCRIPTION | US4427816 |
| DESCRIPTION | US4619956 |
| DESCRIPTION | US4675352 |
| DESCRIPTION | US4681905 |
| DESCRIPTION | US4740542 |
| DESCRIPTION | US4853471 |
| DESCRIPTION | US5004770 |
| DESCRIPTION | US5096489 |
| DESCRIPTION | US5096950 |
| DESCRIPTION | US5106891 |
| DESCRIPTION | US5106898 |
| DESCRIPTION | US5112890 |
| DESCRIPTION | US5124378 |
| DESCRIPTION | US5145893 |
| DESCRIPTION | US5175312 |
| DESCRIPTION | US5204473 |
| DESCRIPTION | US5216052 |
| DESCRIPTION | US5216156 |
| DESCRIPTION | US5234981 |
| DESCRIPTION | US5252643 |
| DESCRIPTION | US5268450 |
| DESCRIPTION | US5278314 |
| DESCRIPTION | US5280124 |
| DESCRIPTION | US5298067 |
| DESCRIPTION | US5300414 |
| DESCRIPTION | US5300544 |
| DESCRIPTION | US5319091 |
| DESCRIPTION | US5354794 |
| DESCRIPTION | US5356966 |
| DESCRIPTION | US5367008 |
| DESCRIPTION | US5369159 |
| DESCRIPTION | US5410071 |
| DESCRIPTION | US5428162 |
| DESCRIPTION | US5428177 |
| DESCRIPTION | US5436349 |
| DESCRIPTION | US5461151 |
| DESCRIPTION | US5476937 |
| DESCRIPTION | US5489503 |
| DESCRIPTION | US5516914 |
| DESCRIPTION | US5543518 |
| DESCRIPTION | US5554760 |
| DESCRIPTION | US5556973 |
| DESCRIPTION | US5563242 |
| DESCRIPTION | US5574166 |
| DESCRIPTION | US5597854 |
| DESCRIPTION | US5607987 |
| DESCRIPTION | US5681955 |
| DESCRIPTION | US5726309 |
| DESCRIPTION | US5736597 |
| DESCRIPTION | US5844026 |
| DESCRIPTION | US5942626 |
| DESCRIPTION | US5959008 |
| DESCRIPTION | US5977219 |
| DESCRIPTION | US5980783 |
| DESCRIPTION | US5998116 |
| DESCRIPTION | US6013704 |
| DESCRIPTION | US6046304 |
| DESCRIPTION | US6060543 |
| DESCRIPTION | US6117995 |
| DESCRIPTION | US6166218 |
| DESCRIPTION | US6242598 |
| DESCRIPTION | US6255483 |
| DESCRIPTION | US6271377 |
| DESCRIPTION | US6297299 |
| DESCRIPTION | US6376584 |
| DESCRIPTION | US6392041 |
| DESCRIPTION | US6472456 |
| DESCRIPTION | US7468410 |
| DESCRIPTION | US7888414 |
| DESCRIPTION | US8304477 |
| INTERNATIONAL-SEARCH-REPORT | US2006276571 |
| OPPOSITION | CN102604209 |
| OPPOSITION | EP0200684 |
| OPPOSITION | EP0839623 |
| OPPOSITION | EP3272804 |
| OPPOSITION | GB1001471 |
| OPPOSITION | JP2003082172 |
| OPPOSITION | JP2011256293 |
| OPPOSITION | JP2017020628 |
| OPPOSITION | US2004152807 |
| OPPOSITION | US5260381 |
| OPPOSITION | US5367025 |
| OPPOSITION | US6719941 |
| OPPOSITION | WO2012082578 |
| OPPOSITION | WO2017013028 |
| OPPOSITION | WO2017033142 |
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.
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Decision to grant a European patent
Search/Exam
Jun 13, 2022
(Electronic) Receipt
Search/Exam
Jun 13, 2022
(Electronic) Receipt
Search/Exam
Jun 13, 2022
French translation of claims
Search/Exam
Jun 13, 2022
French translation of claims
Search/Exam
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German translation of the claims
Search/Exam
Jun 13, 2022
German translation of the claims
Search/Exam
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Letter accompanying subsequently filed items
Search/Exam
Jun 13, 2022
Letter accompanying subsequently filed items
Search/Exam
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Intention to grant (signatures)
Search/Exam
Feb 17, 2022
Text intended for grant (clean copy)
Search/Exam
Feb 17, 2022
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Examination started
Search/Exam
Jun 2, 2021
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Communication to designated inventor
Search/Exam
Mar 8, 2021
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(Electronic) Receipt
Search/Exam
Feb 25, 2021
Request for entry into the European phase
Search/Exam
Jan 19, 2021
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Notification of the recording of a change
Search/Exam
Jan 19, 2021
Notification of the recording of a change
Search/Exam
Jan 15, 2021
Information on entry into European phase
Search/Exam
Mar 16, 2020
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Notification of the recording of a change
Search/Exam
Feb 27, 2020
Copy of the international search report
Search/Exam
Feb 27, 2020
Published international application - A1
Search/Exam
Nov 27, 2019
ISR: cited documents
PCTISA
Nov 27, 2019
Nov 27, 2019
Nov 27, 2019
Oct 4, 2019
Annex
PCTISA
Oct 4, 2019
Sep 19, 2019
Sep 6, 2019
Abstract
PCTISA
Sep 6, 2019
Annex
PCTISA
Sep 6, 2019
Claims
PCTISA
Sep 6, 2019
Description
PCTISA
Sep 6, 2019
Sep 6, 2019
Sep 6, 2019