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The patent EP3838588 was granted to OJI on Nov 30, 2022. The application was filed on Oct 10, 2019 under application number EP19875329A. 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 |
|---|---|---|---|
| KOEHLER INNOVATION & TECHNOLOGY | Aug 29, 2023 | MEISSNER BOLTE PARTNERSCHAFT MBB | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | JP2014173202 |
| DESCRIPTION | JP2017124851 |
| DESCRIPTION | JPS5331265B |
| DESCRIPTION | JPS6234654B |
| INTERNATIONAL-SEARCH-REPORT | JP2004218130 |
| INTERNATIONAL-SEARCH-REPORT | JP2009143615 |
| INTERNATIONAL-SEARCH-REPORT | JP2014173201 |
| INTERNATIONAL-SEARCH-REPORT | JP2016222878 |
| INTERNATIONAL-SEARCH-REPORT | JP2018089980 |
| OPPOSITION | EP2777934 |
| OPPOSITION | EP3461637 |
| OPPOSITION | JP2004027444 |
| OPPOSITION | JP2009155780 |
| OPPOSITION | JP2009256495 |
| OPPOSITION | JP2009274287 |
| OPPOSITION | JP2012200990 |
| OPPOSITION | JP2012224952 |
| OPPOSITION | JP2014181409 |
| SEARCH | WO2009112255 |
| SEARCH | WO2014181560 |
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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Oct 16, 2025
Oct 13, 2025
(Electronic) Receipt
Appeal
Oct 13, 2025
Oct 13, 2025
Reply to appeal
Appeal
Jun 13, 2025
Jun 10, 2025
(Electronic) Receipt
Appeal
Jun 10, 2025
Jun 10, 2025
Apr 16, 2025
Apr 16, 2025
Apr 11, 2025
(Electronic) Receipt
Appeal
Apr 11, 2025
Notice of appeal
Appeal
Apr 11, 2025
Notice of appeal
Appeal
Feb 13, 2025
Feb 13, 2025
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Means of redress
OPPO
Feb 13, 2025
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Nov 20, 2024
Jun 9, 2024
Letter accompanying subsequently filed items
Search/Exam
Feb 13, 2024
Feb 13, 2024
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Dec 13, 2022
Nov 4, 2022
Decision to grant a European patent
Search/Exam
Aug 26, 2022
(Electronic) Receipt
Search/Exam
Aug 26, 2022
Filing of the translations of the claims
Search/Exam
Aug 26, 2022
French translation of claims
Search/Exam
Aug 26, 2022
German translation of the claims
Search/Exam
Aug 26, 2022
Letter accompanying subsequently filed items
Search/Exam
May 18, 2022
May 18, 2022
May 18, 2022
Intention to grant (signatures)
Search/Exam
May 18, 2022
Text intended for grant (clean copy)
Search/Exam
May 18, 2022
Jan 24, 2022
(Electronic) Receipt
Search/Exam
Jan 24, 2022
Amended description with annotations
Search/Exam
Jan 24, 2022
Description
Search/Exam
Jan 24, 2022
Letter accompanying subsequently filed items
Search/Exam
Jan 24, 2022
Dec 20, 2021
Annex to the communication
Search/Exam
Dec 20, 2021
Communication from the Examining Division
Search/Exam
Dec 14, 2021
Examination started
Search/Exam
Nov 14, 2021
(Electronic) Receipt
Search/Exam
Nov 14, 2021
Nov 14, 2021
Amended claims with annotations
Search/Exam
Nov 14, 2021
Amendments received before examination
Search/Exam
Nov 14, 2021
Letter accompanying subsequently filed items
Search/Exam
Aug 26, 2021
Aug 9, 2021
Aug 9, 2021
European search opinion
Search/Exam
Aug 9, 2021
Information on Search Strategy
Search/Exam
Aug 9, 2021
Supplementary European search report
Search/Exam
Jul 22, 2021
Search started
Search/Exam
May 27, 2021
Notification of forthcoming publication
Search/Exam
May 10, 2021
May 10, 2021
Mar 25, 2021
Mar 25, 2021
Mar 25, 2021
Mar 25, 2021
Mar 24, 2021
Communication to designated inventor
Search/Exam
Mar 24, 2021
Communication to designated inventor
Search/Exam
Mar 24, 2021
Communication to designated inventor
Search/Exam
Mar 24, 2021
Communication to designated inventor
Search/Exam
Mar 18, 2021
(Electronic) Receipt
Search/Exam
Mar 18, 2021
Abstract
Search/Exam
Mar 18, 2021
Mar 18, 2021
Amended claims with annotations
Search/Exam
Mar 18, 2021
Authorisation
Search/Exam
Mar 18, 2021
Claims
Search/Exam
Mar 18, 2021
Description
Search/Exam
Mar 18, 2021
Request for entry into the European phase
Search/Exam
Mar 5, 2021
Information on entry into European phase
Search/Exam
May 20, 2020
May 20, 2020
May 20, 2020
Apr 30, 2020
Copy of the international search report
Search/Exam
Apr 30, 2020
Apr 30, 2020
International publication pamphlet
Search/Exam