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The patent EP3921574 was granted to Signify Holding on Oct 5, 2022. The application was filed on Feb 4, 2020 under application number EP20702160A. 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 |
|---|---|---|---|
| COELUX | Jul 5, 2023 | GRATTINGER MOHRING VON POSCHINGER PATENTANWALTE PARTNERSCHAFT MBB | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US2016010811 |
| DESCRIPTION | US2018259155 |
| INTERNATIONAL-SEARCH-REPORT | US2016010811 |
| INTERNATIONAL-SEARCH-REPORT | US2018259155 |
| OPPOSITION | CN109239935 |
| OPPOSITION | CN205824698U |
| OPPOSITION | EP2631085 |
| OPPOSITION | US2016010811 |
| OPPOSITION | US2017254518 |
| OPPOSITION | US2018259155 |
| OPPOSITION | US8469549 |
| OPPOSITION | WO2012140579 |
| OPPOSITION | WO2013011410 |
| OPPOSITION | WO2014075721 |
| OPPOSITION | WO2015176044 |
| OPPOSITION | WO2016134733 |
| OPPOSITION | WO2017036502 |
| OPPOSITION | WO2018144430 |
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 4, 2025
Nov 28, 2025
(Electronic) Receipt
Appeal
Nov 28, 2025
Nov 28, 2025
Reply to appeal
Appeal
Aug 5, 2025
Aug 1, 2025
Jul 25, 2025
(Electronic) Receipt
Appeal
Jul 25, 2025
Jul 25, 2025
Jul 25, 2025
Jul 25, 2025
May 30, 2025
May 30, 2025
May 23, 2025
(Electronic) Receipt
Appeal
May 23, 2025
May 23, 2025
May 23, 2025
Notice of appeal
Appeal
Mar 25, 2025
Mar 25, 2025
Mar 25, 2025
Mar 25, 2025
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Mar 25, 2025
Means of redress
OPPO
Mar 25, 2025
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Oct 17, 2022
Sep 8, 2022
Decision to grant a European patent
Search/Exam
Aug 30, 2022
(Electronic) Receipt
Search/Exam
Aug 30, 2022
Filing of the translations of the claims
Search/Exam
Aug 30, 2022
French translation of claims
Search/Exam
Aug 30, 2022
German translation of the claims
Search/Exam
May 2, 2022
May 2, 2022
May 2, 2022
Intention to grant (signatures)
Search/Exam
May 2, 2022
Text intended for grant (clean copy)
Search/Exam
May 2, 2022
Mar 31, 2022
Examination started
Search/Exam
Nov 17, 2021
Sep 10, 2021
Priority search results copy provided by EPO
Search/Exam
Aug 23, 2021
Aug 4, 2021
(Electronic) Receipt
Search/Exam
Aug 4, 2021
Aug 4, 2021
Amended claims with annotations
Search/Exam
Aug 4, 2021
Aug 4, 2021
Amended description with annotations
Search/Exam
Aug 4, 2021
Amendments received before examination
Search/Exam
Aug 4, 2021
Request for entry into the European phase
Search/Exam
Jun 18, 2021
Information on entry into European phase
Search/Exam
Aug 31, 2020
Aug 13, 2020
Copy of the international search report
Search/Exam
Aug 13, 2020
Published international application - A1
Search/Exam
Feb 10, 2020
Feb 4, 2020
(Electronic) Receipt
PCTRO
Feb 4, 2020
Abstract
PCTRO
Feb 4, 2020
Claims
PCTRO
Feb 4, 2020
Description
PCTRO
Feb 4, 2020
Feb 4, 2020
Drawings
PCTRO
Feb 4, 2020
Feb 4, 2020