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The patent EP3796620 was granted to Ista on Jul 12, 2023. The application was filed on Oct 2, 2019 under application number EP20206448A. The patent is currently recorded with a legal status of "Revoked".

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 |
|---|---|---|---|
| TECHEM ENERGY SERVICES | Apr 4, 2024 | KEIL & SCHAAFHAUSEN PATENTANWALTE PARTGMBB | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| OPPOSITION | EP1843136 |
| OPPOSITION | EP3086102 |
| OPPOSITION | US2015276433 |
| OPPOSITION | US2018090934 |
| OPPOSITION | US2018191867 |
| OPPOSITION | US7557729 |
| OPPOSITION | US8620855 |
| OPPOSITION | US8730056 |
| OPPOSITION | US9279700 |
| OPPOSITION | WO2014151000 |
| OPPOSITION | WO2014165208 |
| SEARCH | EP3086102 |
| SEARCH | US2018090934 |
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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Jul 25, 2023
Jun 15, 2023
Decision to grant a European patent
Search/Exam
Jun 1, 2023
(Electronic) Receipt
Search/Exam
Jun 1, 2023
Filing of the translations of the claims
Search/Exam
Jun 1, 2023
French translation of claims
Search/Exam
Jun 1, 2023
German translation of the claims
Search/Exam
Mar 13, 2023
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Intention to grant (signatures)
Search/Exam
Feb 6, 2023
Text intended for grant (clean copy)
Search/Exam
Feb 6, 2023
Dec 14, 2022
(Electronic) Receipt
Search/Exam
Dec 14, 2022
Amended claims with annotations
Search/Exam
Dec 14, 2022
Claims
Search/Exam
Dec 14, 2022
Letter accompanying subsequently filed items
Search/Exam
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Intention to grant (signatures)
Search/Exam
Aug 16, 2022
Text intended for grant (clean copy)
Search/Exam
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(Electronic) Receipt
Search/Exam
Jun 17, 2022
Amended claims with annotations
Search/Exam
Jun 17, 2022
Claims
Search/Exam
Jun 17, 2022
Letter accompanying subsequently filed items
Search/Exam
Jun 17, 2022
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Intention to grant (signatures)
Search/Exam
Feb 15, 2022
Text intended for grant (clean copy)
Search/Exam
Feb 15, 2022
Jan 27, 2022
Examination started
Search/Exam
Sep 24, 2021
(Electronic) Receipt
Search/Exam
Sep 24, 2021
Sep 24, 2021
Amended claims with annotations
Search/Exam
Sep 24, 2021
Amendments received before examination
Search/Exam
Mar 29, 2021
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Notification of forthcoming publication
Search/Exam
Jan 15, 2021
Communication to designated inventor
Search/Exam
Jan 15, 2021
Communication to designated inventor
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Jan 12, 2021
Refund of fees
Search/Exam
Dec 23, 2020
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European search opinion
Search/Exam
Dec 23, 2020
European search report
Search/Exam
Dec 23, 2020
Information on Search Strategy
Search/Exam
Dec 5, 2020
Search started
Search/Exam
Nov 10, 2020
Priority search results
Search/Exam
Nov 9, 2020
Abstract
Search/Exam
Nov 9, 2020
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Claims
Search/Exam
Nov 9, 2020
Description
Search/Exam
Nov 9, 2020
Designation of inventor
Search/Exam
Nov 9, 2020
Drawings
Search/Exam
Nov 9, 2020
Request for grant of a European patent
Search/Exam
Apr 30, 2020