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The patent EP3916848 was granted to Contemporary Amperex Technology on Feb 22, 2023. The application was filed on Nov 10, 2020 under application number EP20895520A. 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 |
|---|---|---|---|
| ZWICKER SCHNAPPAUF & PARTNER | Sep 22, 2023 | SCHMIDT | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| OPPOSITION | CN107946561 |
| OPPOSITION | CN109103443 |
| OPPOSITION | CN109301184 |
| OPPOSITION | CN109411713 |
| OPPOSITION | CN109449373 |
| OPPOSITION | CN109860538 |
| OPPOSITION | EP3333946 |
| OPPOSITION | JP2016154114 |
| OPPOSITION | KR20190062172 |
| OPPOSITION | KR20190065172 |
| OPPOSITION | KR20190093174 |
| OPPOSITION | US2018287141 |
| OPPOSITION | US2019260020 |
| OPPOSITION | US2019334162 |
| OPPOSITION | WO2018117087 |
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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Sep 25, 2025
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Means of redress
OPPO
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Annexes in respect of a client data request
Search/Exam
Aug 22, 2024
Annexes in respect of a client data request
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Aug 22, 2024
Aug 5, 2024
Annexes in respect of a client data request
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Aug 5, 2024
Annexes in respect of a client data request
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Aug 5, 2024
Annexes in respect of a client data request
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Aug 5, 2024
Annexes in respect of a client data request
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Annexes in respect of a client data request
Search/Exam
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Description
OPPO
Apr 4, 2024
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Authorisation
OPPO
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Decision to grant a European patent
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Jan 12, 2023
(Electronic) Receipt
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Jan 12, 2023
Filing of the translations of the claims
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Jan 12, 2023
French translation of claims
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Jan 12, 2023
German translation of the claims
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Jan 12, 2023
Letter accompanying subsequently filed items
Search/Exam
Dec 15, 2022
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Dec 15, 2022
Intention to grant (signatures)
Search/Exam
Dec 15, 2022
Text intended for grant (clean copy)
Search/Exam
Dec 15, 2022
Oct 25, 2022
Examination started
Search/Exam
Aug 10, 2022
(Electronic) Receipt
Search/Exam
Aug 10, 2022
Aug 10, 2022
Amended claims with annotations
Search/Exam
Aug 10, 2022
Aug 10, 2022
Amended description with annotations
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Aug 10, 2022
Amendments received before examination
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Aug 10, 2022
Letter accompanying subsequently filed items
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Jun 20, 2022
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European search opinion
Search/Exam
May 16, 2022
Information on Search Strategy
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May 16, 2022
Supplementary European search report
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May 4, 2022
Search started
Search/Exam
Dec 11, 2021
Dec 11, 2021
Nov 4, 2021
Notification of forthcoming publication
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Sep 17, 2021
Sep 17, 2021
Sep 15, 2021
Aug 27, 2021
(Electronic) Receipt
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Aug 27, 2021
Abstract
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Aug 27, 2021
Abstract
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Aug 27, 2021
Abstract
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Aug 27, 2021
Aug 27, 2021
Amended claims with annotations
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Aug 27, 2021
Aug 27, 2021
Amended description with annotations
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Aug 27, 2021
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Amended drawings with annotations
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Aug 27, 2021
Claims
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Aug 27, 2021
Description
Search/Exam
Aug 27, 2021
Drawings
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Aug 27, 2021
Enquiry with the International Bureau
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Aug 27, 2021
Request for entry into the European phase
Search/Exam
Jun 28, 2021
Jun 10, 2021
Copy of the international search report
Search/Exam
Jun 10, 2021
Jun 10, 2021
International publication pamphlet
Search/Exam