The weekly litigation news digest is live. Subscribe now
The patent EP3988889 was granted to Schmeisser on Nov 1, 2023. The application was filed on Dec 13, 2018 under application number EP21000253A. 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 |
|---|---|---|---|
| AC UNITY DOO | Jul 31, 2024 | MODIANO | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| OPPOSITION | DE3422334 |
| OPPOSITION | RU2121641 |
| OPPOSITION | RU2588558 |
| OPPOSITION | US2015241152 |
| OPPOSITION | US2217848 |
| OPPOSITION | US3226869 |
| OPPOSITION | US4589218 |
| OPPOSITION | US8061071 |
| OPPOSITION | US8739446 |
| OPPOSITION | US8991086 |
| OPPOSITION | WO2011159383 |
| OPPOSITION | WO2012003020 |
| OPPOSITION | WO2015113122 |
| SEARCH | RU2121641 |
| SEARCH | US4589218 |
| SEARCH | US8061071 |
| SEARCH | WO2011159383 |
| SEARCH | WO2012003020 |
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 17, 2025
Dec 17, 2025
Dec 11, 2025
Dec 11, 2025
Dec 11, 2025
Dec 11, 2025
Dec 11, 2025
Dec 11, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 4, 2025
Dec 4, 2025
Dec 4, 2025
Dec 4, 2025
Aug 14, 2025
Aug 14, 2025
Aug 4, 2025
Jul 29, 2025
Jul 29, 2025
Jul 29, 2025
Apr 17, 2025
Apr 17, 2025
Apr 17, 2025
Apr 17, 2025
Apr 17, 2025
Dec 20, 2024
Dec 16, 2024
Dec 16, 2024
Dec 16, 2024
Dec 16, 2024
Dec 16, 2024
Dec 16, 2024
Dec 16, 2024
Dec 16, 2024
Dec 16, 2024
Dec 16, 2024
Dec 16, 2024
Dec 16, 2024
Dec 16, 2024
Dec 16, 2024
Dec 16, 2024
Dec 16, 2024
Dec 16, 2024
Dec 16, 2024
Dec 16, 2024
Dec 16, 2024
Dec 16, 2024
Dec 16, 2024
Aug 16, 2024
Aug 16, 2024
Aug 7, 2024
Aug 1, 2024
Aug 1, 2024
Aug 1, 2024
Aug 1, 2024
Aug 1, 2024
Aug 1, 2024
Aug 1, 2024
Aug 1, 2024
Aug 1, 2024
Aug 1, 2024
Aug 1, 2024
Aug 1, 2024
Aug 1, 2024
Aug 1, 2024
Aug 1, 2024
Aug 1, 2024
Aug 1, 2024
Aug 1, 2024
Aug 1, 2024
Jul 31, 2024
Jul 31, 2024
Jul 31, 2024
Jul 31, 2024
Nov 14, 2023
Oct 6, 2023
Decision to grant a European patent
Search/Exam
Sep 21, 2023
(Electronic) Receipt
Search/Exam
Sep 21, 2023
English translation of the claims
Search/Exam
Sep 21, 2023
Filing of the translations of the claims
Search/Exam
Sep 21, 2023
French translation of claims
Search/Exam
Sep 21, 2023
Letter accompanying subsequently filed items
Search/Exam
Sep 6, 2023
May 30, 2023
May 30, 2023
May 30, 2023
May 30, 2023
Intention to grant (signatures)
Search/Exam
May 30, 2023
Text intended for grant (clean copy)
Search/Exam
May 30, 2023
Apr 21, 2023
Examination started
Search/Exam
Feb 6, 2023
Oct 26, 2022
(Electronic) Receipt
Search/Exam
Oct 26, 2022
Letter accompanying subsequently filed items
Search/Exam
Oct 26, 2022
Maintenance of the application
Search/Exam
May 3, 2022
Mar 30, 2022
Notification of forthcoming publication
Search/Exam
Mar 30, 2022
Refund of fees
Search/Exam
Mar 25, 2022
Mar 25, 2022
European search opinion
Search/Exam
Mar 25, 2022
European search report
Search/Exam
Mar 25, 2022
Information on Search Strategy
Search/Exam
Dec 22, 2021
Refund of fees
Search/Exam
Dec 20, 2021
Request for further processing allowed
Search/Exam
Dec 16, 2021
Dec 13, 2021
(Electronic) Receipt
Search/Exam
Dec 13, 2021
Abstract
Search/Exam
Dec 13, 2021
Designation of inventor
Search/Exam
Dec 13, 2021
Letter accompanying subsequently filed items
Search/Exam
Dec 13, 2021
Request for further processing
Search/Exam
Dec 7, 2021
Dec 1, 2021
Submission concerning representation
Search/Exam
Oct 14, 2021
Oct 14, 2021
Deficiency in designation of inventor
Search/Exam
Oct 14, 2021
Oct 14, 2021
Oct 13, 2021
Refund of fees
Search/Exam
Oct 13, 2021
Refund of fees
Search/Exam
Oct 13, 2021
Refund of fees
Search/Exam
Oct 7, 2021
Note on telephone consultation
Search/Exam
Oct 1, 2021
Amended claims with annotations
Search/Exam
Oct 1, 2021
Claims
Search/Exam
Oct 1, 2021
Matter concerning the application
Search/Exam
Sep 2, 2021
Description
Search/Exam
Sep 2, 2021
Drawings
Search/Exam
Sep 2, 2021
Previously filed application
Search/Exam
Sep 2, 2021
Request for grant of a European patent
Search/Exam
Aug 27, 2020
Priority search results copy provided by EPO
Search/Exam
Aug 26, 2019