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The patent EP4001734 was granted to Lair Liquide on Aug 23, 2023. The application was filed on Nov 11, 2020 under application number EP20020520A. 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 |
|---|---|---|---|
| LINDE | May 22, 2024 | LU | ADMISSIBLE |
| EVONIK OPERATIONS | May 21, 2024 | EVONIK PATENT ASSOCIATION | ADMISSIBLE |
| OPEN GRID EUROPE | May 16, 2024 | HARLACHER | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | CN206723836U |
| DESCRIPTION | EP2979743 |
| OPPOSITION | EP2979743 |
| OPPOSITION | US2010322845 |
| OPPOSITION | US2014030615 |
| SEARCH | EP2979743 |
| SEARCH | US2010322845 |
| SEARCH | US2019013532 |
| SEARCH | WO2019180032 |
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.
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Letter accompanying subsequently filed items
Search/Exam
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Decision to grant a European patent
Search/Exam
Jul 17, 2023
English translation of the claims
Search/Exam
Jul 17, 2023
Filing of the translations of the claims
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French translation of claims
Search/Exam
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Intention to grant (signatures)
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May 16, 2023
Text intended for grant (clean copy)
Search/Exam
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Annexes in respect of a client data request
Search/Exam
Apr 7, 2023
Letter accompanying subsequently filed items
Search/Exam
Apr 7, 2023
Request for correction of client data
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Apr 7, 2023
Request for correction of client data
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Mar 31, 2023
Examination started
Search/Exam
Sep 19, 2022
Amendments received before examination
Search/Exam
May 31, 2022
Apr 28, 2022
Notification of forthcoming publication
Search/Exam
Nov 2, 2021
Letter concerning the inventor
Search/Exam
Aug 17, 2021
Letter concerning fees and payments
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European search opinion
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European search report
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Apr 29, 2021
Information on Search Strategy
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Search started
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Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Nov 25, 2020
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Abstract
Search/Exam
Nov 11, 2020
Claims
Search/Exam
Nov 11, 2020
Description
Search/Exam
Nov 11, 2020
Designation of inventor
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Nov 11, 2020
Drawings
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Nov 11, 2020
Request for grant of a European patent
Search/Exam