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The patent EP3986156 was granted to DSM Assets on Jul 12, 2023. The application was filed on Jun 18, 2020 under application number EP20732937A. 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 |
|---|---|---|---|
| WEICKMANN & WEICKMANN | Apr 12, 2024 | NEDERLANDSCH OCTROOIBUREAU | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | WO2007066233 |
| DESCRIPTION | WO2010057024 |
| DESCRIPTION | WO2018007492 |
| DESCRIPTION | WO2018007508 |
| DESCRIPTION | WO2018122021 |
| INTERNATIONAL-SEARCH-REPORT | WO2008017039 |
| INTERNATIONAL-SEARCH-REPORT | WO2017102535 |
| INTERNATIONAL-SEARCH-REPORT | WO2018007508 |
| OPPOSITION | US2013129879 |
| OPPOSITION | WO2005102074 |
| OPPOSITION | WO2018007492 |
| OPPOSITION | WO2018007508 |
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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Dec 18, 2025
(Electronic) Receipt
Appeal
Dec 18, 2025
Dec 18, 2025
Notice of appeal
Appeal
Oct 20, 2025
Oct 20, 2025
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Means of redress
Search/Exam
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Authorisation
OPPO
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Sep 24, 2024
Annexes in respect of a client data request
Search/Exam
Sep 24, 2024
Annexes in respect of a client data request
Search/Exam
Sep 24, 2024
Annexes in respect of a client data request
Search/Exam
Sep 24, 2024
Letter accompanying subsequently filed items
Search/Exam
Sep 24, 2024
Sep 3, 2024
Aug 29, 2024
Aug 28, 2024
Annexes in respect of a client data request
Search/Exam
Aug 28, 2024
Letter accompanying subsequently filed items
Search/Exam
Aug 28, 2024
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Jul 25, 2023
Jun 15, 2023
Decision to grant a European patent
Search/Exam
Jun 6, 2023
(Electronic) Receipt
Search/Exam
Jun 6, 2023
Filing of the translations of the claims
Search/Exam
Jun 6, 2023
French translation of claims
Search/Exam
Jun 6, 2023
German translation of the claims
Search/Exam
Jun 6, 2023
Letter accompanying subsequently filed items
Search/Exam
Mar 30, 2023
Mar 30, 2023
Mar 30, 2023
Mar 30, 2023
Intention to grant (signatures)
Search/Exam
Mar 30, 2023
Text intended for grant (clean copy)
Search/Exam
Mar 30, 2023
Mar 13, 2023
Examination started
Search/Exam
Jun 30, 2022
(Electronic) Receipt
Search/Exam
Jun 30, 2022
Letter accompanying subsequently filed items
Search/Exam
Jun 30, 2022
Reply to Written Opinion prepared by the EPO
Search/Exam
Mar 30, 2022
Jan 28, 2022
Jan 21, 2022
Priority search results copy provided by EPO
Search/Exam
Jan 4, 2022
Nov 29, 2021
Information regarding early processing
Search/Exam
Nov 22, 2021
(Electronic) Receipt
Search/Exam
Nov 22, 2021
Request for entry into the European phase
Search/Exam
Oct 29, 2021
Information on entry into European phase
Search/Exam
Jan 11, 2021
Dec 24, 2020
Copy of the international search report
Search/Exam
Dec 24, 2020
Published international application - A1
Search/Exam
Sep 23, 2020
ISR: cited documents
PCTISA
Sep 23, 2020
Sep 23, 2020
Sep 23, 2020
Jun 26, 2020
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Jun 22, 2020
Jun 18, 2020
(Electronic) Receipt
PCTRO
Jun 18, 2020
Abstract
PCTRO
Jun 18, 2020
Claims
PCTRO
Jun 18, 2020
Description
PCTRO
Jun 18, 2020
Jun 18, 2020
Jun 18, 2020