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The patent EP2920270 was granted to Basf on May 30, 2018. The application was filed on Nov 6, 2013 under application number EP13786276A. 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 |
|---|---|---|---|
| KEMIRA OYJ | Feb 28, 2019 | SANTARELLI | - |
| SNF | Feb 22, 2019 | HOFFMANN EITLE | - |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | CA832277 |
| DESCRIPTION | DE2419764 |
| DESCRIPTION | EP2283915 |
| DESCRIPTION | US2005239957 |
| DESCRIPTION | US2010004830 |
| DESCRIPTION | US4052353 |
| DESCRIPTION | US4528321 |
| DESCRIPTION | US6365656 |
| DESCRIPTION | US6392596 |
| DESCRIPTION | US6833406 |
| DESCRIPTION | WO0244228 |
| DESCRIPTION | WO2012061147 |
| DESCRIPTION | WO2012069477 |
| INTERNATIONAL-SEARCH-REPORT | US2005239957 |
| INTERNATIONAL-SEARCH-REPORT | US2010048430 |
| INTERNATIONAL-SEARCH-REPORT | WO0244228 |
| INTERNATIONAL-SEARCH-REPORT | WO2012061147 |
| OPPOSITION | EP2283915 |
| OPPOSITION | US2005239957 |
| OPPOSITION | US2010048430 |
| OPPOSITION | US3724547 |
| OPPOSITION | US4034809 |
| OPPOSITION | US4245700 |
| OPPOSITION | US4374216 |
| OPPOSITION | US4528321 |
| OPPOSITION | WO0244228 |
| OPPOSITION | WO2012061147 |
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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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
May 6, 2024
Authorisation
Appeal
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Apr 29, 2024
(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
Jan 5, 2023
Jan 5, 2023
Reply to appeal
Appeal
Dec 23, 2022
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Dec 20, 2022
(Electronic) Receipt
Appeal
Dec 20, 2022
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Reply to appeal
Appeal
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
Jun 14, 2022
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Notice of appeal
Appeal
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OPPO
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Jun 11, 2018
May 4, 2018
Decision to grant a European patent
Search/Exam
Apr 20, 2018
(Electronic) Receipt
Search/Exam
Apr 20, 2018
French translation of claims
Search/Exam
Apr 20, 2018
German translation of the claims
Search/Exam
Apr 20, 2018
Letter accompanying subsequently filed items
Search/Exam
Jan 5, 2018
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Jan 5, 2018
Intention to grant (signatures)
Search/Exam
Jan 5, 2018
Text intended for grant (clean copy)
Search/Exam
Jan 5, 2018
Nov 13, 2017
(Electronic) Receipt
Search/Exam
Nov 13, 2017
Abstract
Search/Exam
Nov 13, 2017
Abstract
Search/Exam
Nov 13, 2017
Amended description with annotations
Search/Exam
Nov 13, 2017
Description
Search/Exam
Nov 13, 2017
Letter accompanying subsequently filed items
Search/Exam
Nov 13, 2017
Sep 25, 2017
Annex to the communication
Search/Exam
Sep 25, 2017
Communication from the Examining Division
Search/Exam
Feb 15, 2017
Feb 15, 2017
Submission concerning representation
Search/Exam
Aug 2, 2016
(Electronic) Receipt
Search/Exam
Aug 2, 2016
Amended claims with annotations
Search/Exam
Aug 2, 2016
Claims
Search/Exam
Aug 2, 2016
Letter accompanying subsequently filed items
Search/Exam
Aug 2, 2016
May 24, 2016
Annex to the communication
Search/Exam
May 24, 2016
Communication from the Examining Division
Search/Exam
May 18, 2016
Examination started
Search/Exam
Mar 16, 2016
Mar 10, 2016
Mar 3, 2016
CDS Clean up - amended applicant details
Search/Exam
Mar 3, 2016
Dec 1, 2015
(Electronic) Receipt
Search/Exam
Dec 1, 2015
Letter accompanying subsequently filed items
Search/Exam
Dec 1, 2015
Reply to Written Opinion prepared by the EPO
Search/Exam
Aug 26, 2015
Jun 26, 2015
Jun 24, 2015
Communication to designated inventor
Search/Exam
Jun 24, 2015
Communication to designated inventor
Search/Exam
Jun 24, 2015
Communication to designated inventor
Search/Exam
Jun 24, 2015
Communication to designated inventor
Search/Exam
Jun 19, 2015
Priority search results copy provided by EPO
Search/Exam
Jun 1, 2015
May 11, 2015
(Electronic) Receipt
Search/Exam
May 11, 2015
Request for entry into the European phase
Search/Exam
Mar 27, 2015
Information on entry into European phase
Search/Exam
Jun 12, 2014
May 22, 2014
Copy of the international search report
Search/Exam
May 22, 2014
Published international application - A1
Search/Exam
Mar 20, 2014
Nov 20, 2013
Nov 20, 2013
Nov 20, 2013
Nov 6, 2013
(Electronic) Receipt
PCTRO
Nov 6, 2013
Abstract
PCTRO
Nov 6, 2013
Claims
PCTRO
Nov 6, 2013
Description
PCTRO
Nov 6, 2013
Drawings
PCTRO
Nov 6, 2013