The weekly litigation news digest is live. Subscribe now
The patent EP3887452 was granted to Eckart on Nov 2, 2022. The application was filed on Apr 9, 2020 under application number EP20720380A. 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 |
|---|---|---|---|
| MERCK PATENT | Aug 2, 2023 | RUSSELL | ADMISSIBLE |
| PPG INDUSTRIES | Aug 2, 2023 | F & E PATENT | WITHDRAWN |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | EP20320303812 |
| DESCRIPTION | DE102009029763 |
| DESCRIPTION | DE4227082 |
| DESCRIPTION | EP0246523 |
| DESCRIPTION | EP0332071 |
| DESCRIPTION | EP0632109 |
| DESCRIPTION | EP0681009 |
| DESCRIPTION | EP0735115 |
| DESCRIPTION | EP0842229 |
| DESCRIPTION | EP0888410 |
| DESCRIPTION | EP1084198 |
| DESCRIPTION | EP1620511 |
| DESCRIPTION | EP1682622 |
| DESCRIPTION | EP1727864 |
| DESCRIPTION | EP2691478 |
| DESCRIPTION | EP2904052 |
| DESCRIPTION | EP3080209 |
| DESCRIPTION | EP3119840 |
| DESCRIPTION | JP2004244516 |
| DESCRIPTION | JP2009102626 |
| DESCRIPTION | US2010022696 |
| DESCRIPTION | US4623396 |
| DESCRIPTION | US6290766 |
| DESCRIPTION | US6361593 |
| DESCRIPTION | WO2012130776 |
| DESCRIPTION | WO9743348 |
| INTERNATIONAL-SEARCH-REPORT | US2010022696 |
| INTERNATIONAL-SEARCH-REPORT | WO2005111152 |
| OPPOSITION | DE4227082 |
| OPPOSITION | EP0045851 |
| OPPOSITION | EP0246523 |
| OPPOSITION | EP0332071 |
| OPPOSITION | EP0681009 |
| OPPOSITION | EP0735115 |
| OPPOSITION | EP0842229 |
| OPPOSITION | EP1013724 |
| OPPOSITION | EP3211043 |
| OPPOSITION | EP3733802 |
| OPPOSITION | JP2001164191 |
| OPPOSITION | JP2004244516 |
| OPPOSITION | US2003177950 |
| OPPOSITION | US2007028799 |
| OPPOSITION | US2010022696 |
| OPPOSITION | US2014010772 |
| OPPOSITION | US2014018439 |
| OPPOSITION | US2017130054 |
| OPPOSITION | US2017321057 |
| OPPOSITION | US4623396 |
| OPPOSITION | US5277711 |
| OPPOSITION | US5702519 |
| OPPOSITION | US6290766 |
| OPPOSITION | US6361593 |
| OPPOSITION | WO03014228 |
| OPPOSITION | WO2012130776 |
| OPPOSITION | WO2016091355 |
| OPPOSITION | WO9743348 |
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
Get instant alerts for new documents
Dec 18, 2025
Dec 18, 2025
Dec 4, 2025
Dec 4, 2025
Dec 4, 2025
Dec 4, 2025
Nov 17, 2025
Nov 17, 2025
Nov 17, 2025
Nov 10, 2025
Aug 5, 2025
Aug 5, 2025
Aug 5, 2025
Aug 5, 2025
Aug 5, 2025
Aug 5, 2025
Aug 5, 2025
Aug 5, 2025
Aug 5, 2025
Means of redress
OPPO
Aug 5, 2025
Aug 5, 2025
Aug 5, 2025
Aug 5, 2025
Aug 5, 2025
Aug 5, 2025
Aug 5, 2025
Jun 12, 2025
Jun 5, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Jun 3, 2025
Apr 22, 2025
Apr 16, 2025
Apr 16, 2025
Apr 10, 2025
Apr 10, 2025
Apr 10, 2025
Apr 10, 2025
Apr 10, 2025
Apr 10, 2025
Apr 10, 2025
Apr 10, 2025
Apr 9, 2025
Apr 9, 2025
Apr 9, 2025
Dec 19, 2024
Dec 13, 2024
Dec 13, 2024
Dec 13, 2024
Dec 13, 2024
Dec 13, 2024
Dec 13, 2024
Dec 13, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Feb 29, 2024
Feb 29, 2024
Feb 29, 2024
Feb 23, 2024
Feb 23, 2024
Feb 23, 2024
Jan 4, 2024
Jan 4, 2024
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 14, 2023
Dec 14, 2023
Dec 14, 2023
Dec 8, 2023
Dec 8, 2023
Nov 28, 2023
Nov 28, 2023
Nov 28, 2023
Sep 4, 2023
Sep 4, 2023
Sep 4, 2023
Sep 4, 2023
Aug 30, 2023
Aug 30, 2023
Authorisation
OPPO
Aug 30, 2023
Aug 30, 2023
Aug 14, 2023
Aug 14, 2023
Aug 14, 2023
Aug 7, 2023
Aug 7, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Aug 2, 2023
Nov 15, 2022
Oct 7, 2022
Decision to grant a European patent
Search/Exam
Sep 23, 2022
(Electronic) Receipt
Search/Exam
Sep 23, 2022
Filing of the translations of the claims
Search/Exam
Sep 23, 2022
French translation of claims
Search/Exam
Sep 23, 2022
German translation of the claims
Search/Exam
Jun 17, 2022
Jun 17, 2022
Jun 17, 2022
Intention to grant (signatures)
Search/Exam
Jun 17, 2022
Text intended for grant (clean copy)
Search/Exam
Jun 17, 2022
May 10, 2022
Examination started
Search/Exam
Nov 12, 2021
(Electronic) Receipt
Search/Exam
Nov 12, 2021
Abstract
Search/Exam
Nov 12, 2021
Nov 12, 2021
Amended claims with annotations
Search/Exam
Nov 12, 2021
Nov 12, 2021
Amended description with annotations
Search/Exam
Nov 12, 2021
Amendments received before examination
Search/Exam
Nov 12, 2021
Letter accompanying subsequently filed items
Search/Exam
Nov 12, 2021
Modified abstract
Search/Exam
Oct 25, 2021
Sep 8, 2021
Jul 13, 2021
Jul 9, 2021
Jul 6, 2021
(Electronic) Receipt
Search/Exam
Jul 6, 2021
Letter accompanying subsequently filed items
Search/Exam
Jul 6, 2021
Priority search results copy provided by EPO
Search/Exam
Jul 1, 2021
(Electronic) Receipt
Search/Exam
Jul 1, 2021
Request for entry into the European phase
Search/Exam
Nov 2, 2020
Oct 15, 2020
Copy of the international search report
Search/Exam
Oct 15, 2020
Published international application - A1
Search/Exam
May 6, 2020
May 6, 2020
Apr 9, 2020
(Electronic) Receipt
PCTRO
Apr 9, 2020
Abstract
PCTRO
Apr 9, 2020
Claims
PCTRO
Apr 9, 2020
Description
PCTRO
Apr 9, 2020
Apr 9, 2020