The weekly litigation news digest is live. Subscribe now
The patent EP3199952 was granted to Chugai Seiyaku Kabushiki Kaisha on Nov 2, 2022. The application was filed on Sep 24, 2015 under application number EP15843728A. 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 |
|---|---|---|---|
| MAIWALD | Aug 2, 2023 | MAIWALD | ADMISSIBLE |
| WUESTHOFF & WUESTHOFF PATENTANWALTE PARTG MBB | Jul 26, 2023 | WICHMANN | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | JP2012082201 |
| INTERNATIONAL-SEARCH-REPORT | US2013330345 |
| INTERNATIONAL-SEARCH-REPORT | WO2014050926 |
| OPPOSITION | EP1876236 |
| OPPOSITION | EP2644698 |
| OPPOSITION | EP2902787 |
| OPPOSITION | EP3199554 |
| OPPOSITION | US2013330345 |
| OPPOSITION | WO2011159820 |
| OPPOSITION | WO2012067176 |
| OPPOSITION | WO2014050926 |
| OPPOSITION | WO9218539 |
| SEARCH | US2003211460 |
| SEARCH | US2013330345 |
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 11, 2025
Nov 28, 2025
Nov 28, 2025
Nov 26, 2025
Nov 26, 2025
Nov 26, 2025
Nov 26, 2025
Oct 16, 2025
Oct 16, 2025
Oct 15, 2025
Oct 15, 2025
Oct 15, 2025
Oct 15, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 10, 2025
Oct 9, 2025
Oct 9, 2025
Oct 9, 2025
Apr 3, 2025
Apr 3, 2025
Apr 3, 2025
Apr 3, 2025
Apr 3, 2025
Apr 3, 2025
Apr 1, 2025
Apr 1, 2025
Apr 1, 2025
Mar 26, 2025
Mar 26, 2025
Mar 21, 2025
Mar 21, 2025
Mar 21, 2025
Mar 21, 2025
Mar 19, 2025
Mar 19, 2025
Mar 19, 2025
Mar 19, 2025
Mar 19, 2025
Mar 19, 2025
Oct 17, 2024
Oct 17, 2024
Oct 14, 2024
Oct 14, 2024
Oct 14, 2024
Sep 18, 2024
Sep 18, 2024
Sep 13, 2024
Sep 13, 2024
Sep 13, 2024
Apr 10, 2024
Apr 10, 2024
Apr 5, 2024
Apr 5, 2024
Apr 5, 2024
Apr 5, 2024
Apr 5, 2024
Apr 5, 2024
Jan 5, 2024
Jan 5, 2024
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Dec 28, 2023
Aug 14, 2023
Aug 14, 2023
Aug 14, 2023
Aug 7, 2023
Aug 4, 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
Jul 31, 2023
Jul 31, 2023
Jul 31, 2023
Jul 26, 2023
Jul 26, 2023
Jul 26, 2023
Jul 26, 2023
Jul 26, 2023
Jul 26, 2023
Jul 26, 2023
Jul 26, 2023
Jul 26, 2023
Jul 26, 2023
Jul 26, 2023
Jul 26, 2023
Jul 26, 2023
Jul 26, 2023
Jul 26, 2023
Jul 26, 2023
Jul 26, 2023
Nov 15, 2022
Oct 7, 2022
Decision to grant a European patent
Search/Exam
Sep 27, 2022
(Electronic) Receipt
Search/Exam
Sep 27, 2022
Filing of the translations of the claims
Search/Exam
Sep 27, 2022
Letter accompanying subsequently filed items
Search/Exam
Jul 18, 2022
Jul 18, 2022
Jul 18, 2022
Intention to grant (signatures)
Search/Exam
Jul 18, 2022
Text intended for grant (clean copy)
Search/Exam
Jul 18, 2022
Text intended for grant (sequence listing)
Search/Exam
Jul 18, 2022
Jun 27, 2022
(Electronic) Receipt
Search/Exam
Jun 27, 2022
Amended claims with annotations
Search/Exam
Jun 27, 2022
Amended description with annotations
Search/Exam
Jun 27, 2022
Claims
Search/Exam
Jun 27, 2022
Description
Search/Exam
Jun 27, 2022
French translation of claims
Search/Exam
Jun 27, 2022
German translation of the claims
Search/Exam
Jun 27, 2022
Letter accompanying subsequently filed items
Search/Exam
Jun 27, 2022
Feb 16, 2022
Feb 16, 2022
Feb 16, 2022
Intention to grant (signatures)
Search/Exam
Feb 16, 2022
Text intended for grant (clean copy)
Search/Exam
Feb 16, 2022
Text intended for grant (sequence listing)
Search/Exam
Feb 16, 2022
Dec 15, 2020
(Electronic) Receipt
Search/Exam
Dec 15, 2020
Amended claims with annotations
Search/Exam
Dec 15, 2020
Amended description with annotations
Search/Exam
Dec 15, 2020
Claims
Search/Exam
Dec 15, 2020
Description
Search/Exam
Dec 15, 2020
Letter accompanying subsequently filed items
Search/Exam
Dec 15, 2020
Oct 29, 2020
Oct 26, 2020
(Electronic) Receipt
Search/Exam
Oct 26, 2020
Letter accompanying subsequently filed items
Search/Exam
Oct 26, 2020
Jun 19, 2020
Annex to the communication
Search/Exam
Jun 19, 2020
Communication from the Examining Division
Search/Exam
Aug 21, 2019
Amended claims with annotations
Search/Exam
Aug 21, 2019
Claims
Search/Exam
Aug 21, 2019
Jun 26, 2019
Jun 19, 2019
Jun 17, 2019
May 20, 2019
(Electronic) Receipt
Search/Exam
May 20, 2019
Annexes in respect of a client data request
Search/Exam
May 20, 2019
Letter accompanying subsequently filed items
Search/Exam
May 20, 2019
Feb 11, 2019
Annex to the communication
Search/Exam
Feb 11, 2019
Communication from the Examining Division
Search/Exam
Feb 4, 2019
Examination started
Search/Exam
Sep 3, 2018
Sep 3, 2018
Amended claims with annotations
Search/Exam
Sep 3, 2018
Amendments received before examination
Search/Exam
Feb 23, 2018
Feb 6, 2018
Feb 6, 2018
European search opinion
Search/Exam
Feb 6, 2018
Information on Search Strategy
Search/Exam
Feb 6, 2018
Supplementary European search report
Search/Exam
Jan 18, 2018
Search started
Search/Exam
Jul 5, 2017
Notification of forthcoming publication
Search/Exam
May 9, 2017
May 4, 2017
Communication to designated inventor
Search/Exam
May 4, 2017
Communication to designated inventor
Search/Exam
May 4, 2017
Communication to designated inventor
Search/Exam
May 4, 2017
Communication to designated inventor
Search/Exam
Apr 11, 2017
(Electronic) Receipt
Search/Exam
Apr 11, 2017
Abstract
Search/Exam
Apr 11, 2017
Apr 11, 2017
Apr 11, 2017
Amended claims with annotations
Search/Exam
Apr 11, 2017
Amendments received before examination
Search/Exam
Apr 11, 2017
Claims
Search/Exam
Apr 11, 2017
Converted Sequence Listing
Search/Exam
Apr 11, 2017
Apr 11, 2017
Description
Search/Exam
Apr 11, 2017
Drawings
Search/Exam
Apr 11, 2017
Request for entry into the European phase
Search/Exam
Apr 11, 2017
Feb 3, 2017
Information on entry into European phase
Search/Exam
Apr 19, 2016
Mar 31, 2016
Converted Sequence Listing
Search/Exam
Mar 31, 2016
Copy of the international search report
Search/Exam
Mar 31, 2016
Mar 31, 2016
International publication pamphlet
Search/Exam