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The patent EP3591324 was granted to Zhejiang Dunan Thermal Technology on Sep 6, 2023. The application was filed on Jul 3, 2019 under application number EP19184276A. 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 |
|---|---|---|---|
| SCHMIDT MARTIN | Mar 21, 2024 | ADVOTEC | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| EXAMINATION | EP1231448 |
| OPPOSITION | CN101846465 |
| OPPOSITION | CN105202816 |
| OPPOSITION | EP0654645 |
| OPPOSITION | US2003183378 |
| SEARCH | US2003183378 |
| SEARCH | US2015168071 |
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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Means of redress
OPPO
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Sep 19, 2023
Aug 10, 2023
Decision to grant a European patent
Search/Exam
Jul 31, 2023
(Electronic) Receipt
Search/Exam
Jul 31, 2023
Filing of the translations of the claims
Search/Exam
Jul 31, 2023
French translation of claims
Search/Exam
Jul 31, 2023
German translation of the claims
Search/Exam
Apr 18, 2023
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Intention to grant (signatures)
Search/Exam
Apr 18, 2023
Text intended for grant (clean copy)
Search/Exam
Apr 18, 2023
Jun 30, 2022
(Electronic) Receipt
Search/Exam
Jun 30, 2022
Amended claims with annotations
Search/Exam
Jun 30, 2022
Claims
Search/Exam
Jun 30, 2022
Letter accompanying subsequently filed items
Search/Exam
Jun 30, 2022
Mar 2, 2022
Annex to the communication
Search/Exam
Mar 2, 2022
Communication from the Examining Division
Search/Exam
Nov 10, 2021
Document concerning representation
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Nov 10, 2021
Letter accompanying subsequently filed items
Search/Exam
Jun 18, 2021
(Electronic) Receipt
Search/Exam
Jun 18, 2021
Amended drawings with annotations
Search/Exam
Jun 18, 2021
Drawings
Search/Exam
Jun 18, 2021
Letter accompanying subsequently filed items
Search/Exam
Jun 18, 2021
Feb 10, 2021
Annex to the communication
Search/Exam
Feb 10, 2021
Communication from the Examining Division
Search/Exam
Sep 1, 2020
(Electronic) Receipt
Search/Exam
Sep 1, 2020
Amended claims with annotations
Search/Exam
Sep 1, 2020
Claims
Search/Exam
Sep 1, 2020
Letter accompanying subsequently filed items
Search/Exam
Sep 1, 2020
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May 29, 2020
May 20, 2020
Annex to the communication
Search/Exam
May 20, 2020
Communication from the Examining Division
Search/Exam
May 13, 2020
Examination started
Search/Exam
Apr 29, 2020
(Electronic) Receipt
Search/Exam
Apr 29, 2020
Letter accompanying subsequently filed items
Search/Exam
Apr 29, 2020
Mar 27, 2020
Mar 16, 2020
(Electronic) Receipt
Search/Exam
Mar 16, 2020
Mar 16, 2020
Amended claims with annotations
Search/Exam
Mar 16, 2020
Mar 16, 2020
Amended description with annotations
Search/Exam
Mar 16, 2020
Amendments received before examination
Search/Exam
Mar 16, 2020
Letter accompanying subsequently filed items
Search/Exam
Jan 13, 2020
Dec 11, 2019
Notification of forthcoming publication
Search/Exam
Oct 29, 2019
Oct 29, 2019
European search opinion
Search/Exam
Oct 29, 2019
European search report
Search/Exam
Oct 29, 2019
Information on Search Strategy
Search/Exam
Oct 18, 2019
Oct 18, 2019
Oct 17, 2019
Search started
Search/Exam
Oct 2, 2019
Letter which had not been notified
Search/Exam
Oct 2, 2019
Letter which had not been notified
Search/Exam
Sep 10, 2019
Sep 3, 2019
Aug 26, 2019
Communication to designated inventor
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Aug 26, 2019
Communication to designated inventor
Search/Exam
Aug 26, 2019
Communication to designated inventor
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Jul 3, 2019
Abstract
Search/Exam
Jul 3, 2019
Jul 3, 2019
Claims
Search/Exam
Jul 3, 2019
Description
Search/Exam
Jul 3, 2019
Designation of inventor
Search/Exam
Jul 3, 2019
Drawings
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Jul 3, 2019
Request for grant of a European patent
Search/Exam