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The patent EP3256422 was granted to Basf on Apr 6, 2022. The application was originally filed on Feb 11, 2016 under application number EP16748811A. 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 | US2012259141 |
| DESCRIPTION | US3308069 |
| DESCRIPTION | US4554145 |
| DESCRIPTION | US4642226 |
| DESCRIPTION | US5139759 |
| DESCRIPTION | WO2010043843 |
| DESCRIPTION | WO2010146156 |
| DESCRIPTION | WO2012137132 |
| DESCRIPTION | WO2014060260 |
| INTERNATIONAL-SEARCH-REPORT | WO2010146156 |
| INTERNATIONAL-SEARCH-REPORT | WO2012137132 |
| INTERNATIONAL-SEARCH-REPORT | WO2014060260 |
| OPPOSITION | US6306364 |
| OPPOSITION | WO2015024875 |
| SEARCH | CN103748038 |
| SEARCH | US2012259141 |
| SEARCH | US4645864 |
| SEARCH | WO2014060260 |
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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Mar 11, 2022
Decision to grant a European patent
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Feb 16, 2022
(Electronic) Receipt
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Feb 16, 2022
Filing of the translations of the claims
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Feb 16, 2022
French translation of claims
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Feb 16, 2022
German translation of the claims
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Dec 1, 2021
Nov 30, 2021
Nov 19, 2021
(Electronic) Receipt
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Nov 19, 2021
Letter accompanying subsequently filed items
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Nov 19, 2021
Nov 5, 2021
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Nov 5, 2021
Intention to grant (signatures)
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Nov 5, 2021
Text intended for grant (clean copy)
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Nov 5, 2021
Aug 4, 2021
Document concerning representation
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Sep 22, 2020
(Electronic) Receipt
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Sep 22, 2020
Amended claims with annotations
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Sep 22, 2020
Amended description with annotations
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Sep 22, 2020
Amended drawings with annotations
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Sep 22, 2020
Claims
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Sep 22, 2020
Description
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Sep 22, 2020
Drawings
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Sep 22, 2020
Letter accompanying subsequently filed items
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Sep 22, 2020
May 18, 2020
Annex to the communication
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May 18, 2020
Communication from the Examining Division
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Apr 3, 2020
(Electronic) Receipt
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Apr 3, 2020
Amended claims with annotations
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Apr 3, 2020
Claims
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Apr 3, 2020
Letter accompanying subsequently filed items
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Apr 3, 2020
Nov 25, 2019
Annex to the communication
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Nov 25, 2019
Communication from the Examining Division
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Nov 14, 2019
Examination started
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Jun 14, 2019
Submission concerning representation
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Jan 16, 2019
(Electronic) Receipt
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Jan 16, 2019
Jan 16, 2019
Amended claims with annotations
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Jan 16, 2019
Amendments received before examination
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Jan 16, 2019
Letter accompanying subsequently filed items
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Aug 23, 2018
Aug 6, 2018
Aug 6, 2018
European search opinion
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Aug 6, 2018
Information on Search Strategy
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Aug 6, 2018
Supplementary European search report
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Jul 25, 2018
Search started
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Dec 5, 2017
Nov 29, 2017
Letter which had not been notified
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Nov 22, 2017
Sep 22, 2017
Sep 20, 2017
Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Sep 20, 2017
Communication to designated inventor
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Aug 30, 2017
Aug 25, 2017
(Electronic) Receipt
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Aug 25, 2017
Letter accompanying subsequently filed items
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Aug 25, 2017
Matter concerning the application
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Aug 22, 2017
(Electronic) Receipt
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Aug 22, 2017
Request for entry into the European phase
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Jun 23, 2017
Information on entry into European phase
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Apr 19, 2017
Notification of the recording of a change
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Sep 6, 2016
Aug 18, 2016
Copy of the international search report
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Aug 18, 2016
Published international application - A1
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