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The patent EP3660397 was granted to Ebara Environmental Plant on Apr 21, 2021. The application was filed on Jul 9, 2018 under application number EP18840599A. 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 |
|---|---|---|---|
| HITACHI ZOSEN INOVA | Jan 20, 2022 | SCHAAD | - |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | JPS5025120B |
| INTERNATIONAL-SEARCH-REPORT | JP2011027349 |
| INTERNATIONAL-SEARCH-REPORT | JP2017109161 |
| INTERNATIONAL-SEARCH-REPORT | JPH07301413 |
| INTERNATIONAL-SEARCH-REPORT | JPH1038243 |
| OPPOSITION | EP1048900 |
| OPPOSITION | JP2011027349 |
| OPPOSITION | JP2017109197 |
| OPPOSITION | JP5969685B |
| SEARCH | DE102010031528 |
| SEARCH | EP1048900 |
| SEARCH | JP2015143139 |
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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Nov 20, 2025
Nov 20, 2025
Nov 5, 2025
Nov 4, 2025
(Electronic) Receipt
Appeal
Nov 4, 2025
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
Oct 3, 2025
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(Electronic) Receipt
Appeal
Aug 19, 2025
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Appeal
May 23, 2025
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(Electronic) Receipt
Appeal
Aug 12, 2024
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(Electronic) Receipt
Appeal
Jul 1, 2024
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Reply to appeal
Appeal
Apr 11, 2024
Mar 1, 2024
Feb 27, 2024
(Electronic) Receipt
Appeal
Feb 27, 2024
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Notice of appeal
Appeal
Feb 27, 2024
Jan 10, 2024
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(Electronic) Receipt
Appeal
Jan 4, 2024
Jan 4, 2024
Notice of appeal
Appeal
Nov 14, 2023
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Means of redress
OPPO
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May 4, 2021
Mar 25, 2021
Decision to grant a European patent
Search/Exam
Mar 18, 2021
Mar 15, 2021
(Electronic) Receipt
Search/Exam
Mar 15, 2021
Filing of the translations of the claims
Search/Exam
Mar 15, 2021
French translation of claims
Search/Exam
Mar 15, 2021
German translation of the claims
Search/Exam
Mar 15, 2021
Letter accompanying subsequently filed items
Search/Exam
Dec 22, 2020
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Intention to grant (signatures)
Search/Exam
Dec 22, 2020
Text intended for grant (clean copy)
Search/Exam
Dec 22, 2020
Dec 3, 2020
Examination started
Search/Exam
Sep 30, 2020
Sep 30, 2020
Amended claims with annotations
Search/Exam
Sep 30, 2020
Sep 30, 2020
Amended description with annotations
Search/Exam
Sep 30, 2020
Amendments received before examination
Search/Exam
May 28, 2020
May 8, 2020
May 8, 2020
European search opinion
Search/Exam
May 8, 2020
Information on Search Strategy
Search/Exam
May 8, 2020
Supplementary European search report
Search/Exam
May 7, 2020
Notification of forthcoming publication
Search/Exam
Apr 14, 2020
Search started
Search/Exam
Mar 6, 2020
Communication to designated inventor
Search/Exam
Mar 6, 2020
Communication to designated inventor
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Mar 6, 2020
Communication to designated inventor
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Mar 6, 2020
Communication to designated inventor
Search/Exam
Mar 6, 2020
Communication to designated inventor
Search/Exam
Feb 17, 2020
Feb 17, 2020
Jan 31, 2020
(Electronic) Receipt
Search/Exam
Jan 31, 2020
Abstract
Search/Exam
Jan 31, 2020
Claims
Search/Exam
Jan 31, 2020
Description
Search/Exam
Jan 31, 2020
Drawings
Search/Exam
Jan 31, 2020
Request for entry into the European phase
Search/Exam
Dec 13, 2019
Information on entry into European phase
Search/Exam
Feb 27, 2019
Feb 7, 2019
Copy of the international search report
Search/Exam
Feb 7, 2019
Feb 7, 2019
International publication pamphlet
Search/Exam