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The patent EP3538571 was granted to Univation on Jun 25, 2025. The application was filed on Oct 25, 2017 under application number EP17804682A. The patent is currently recorded with a legal status of "Patent Maintained As Amended".

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 |
|---|---|---|---|
| TOTALENERGIES ONETECH | Mar 1, 2023 | GARCIA MARTIN | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | BE839380 |
| DESCRIPTION | EP0511665 |
| DESCRIPTION | EP0634421 |
| DESCRIPTION | EP0649992 |
| DESCRIPTION | EP0767184 |
| DESCRIPTION | EP0794200 |
| DESCRIPTION | EP0802202 |
| DESCRIPTION | US2006173123 |
| DESCRIPTION | US3324095 |
| DESCRIPTION | US3709853 |
| DESCRIPTION | US4003712 |
| DESCRIPTION | US4011382 |
| DESCRIPTION | US4302566 |
| DESCRIPTION | US4543399 |
| DESCRIPTION | US4588790 |
| DESCRIPTION | US4613484 |
| DESCRIPTION | US4882400 |
| DESCRIPTION | US4988783 |
| DESCRIPTION | US4994534 |
| DESCRIPTION | US5352749 |
| DESCRIPTION | US5436304 |
| DESCRIPTION | US5462999 |
| DESCRIPTION | US5541270 |
| DESCRIPTION | US5627242 |
| DESCRIPTION | US5665818 |
| DESCRIPTION | US5677375 |
| DESCRIPTION | US5965477 |
| DESCRIPTION | US5972510 |
| DESCRIPTION | US6034187 |
| DESCRIPTION | US6489408 |
| DESCRIPTION | US6534604 |
| DESCRIPTION | US6579922 |
| DESCRIPTION | WO0012565 |
| DESCRIPTION | WO0013792 |
| DESCRIPTION | WO9947598 |
| DESCRIPTION | WO9948605 |
| DESCRIPTION | WO9950311 |
| DESCRIPTION | WO9960033 |
| INTERNATIONAL-SEARCH-REPORT | US2006036041 |
| INTERNATIONAL-SEARCH-REPORT | US5852116 |
| INTERNATIONAL-SEARCH-REPORT | WO0192405 |
| INTERNATIONAL-SEARCH-REPORT | WO2015071807 |
| INTERNATIONAL-SEARCH-REPORT | WO2016168700 |
| OPPOSITION | EP2832753 |
| OPPOSITION | EP2927245 |
| OPPOSITION | WO2007024773 |
| OPPOSITION | WO2009082451 |
| OPPOSITION | WO2012010690 |
| OPPOSITION | WO2018089195 |
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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Description
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Decision to grant a European patent
Search/Exam
Apr 21, 2022
(Electronic) Receipt
Search/Exam
Apr 21, 2022
Filing of the translations of the claims
Search/Exam
Apr 21, 2022
French translation of claims
Search/Exam
Apr 21, 2022
German translation of the claims
Search/Exam
Apr 21, 2022
Letter accompanying subsequently filed items
Search/Exam
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Intention to grant (signatures)
Search/Exam
Dec 20, 2021
Text intended for grant (clean copy)
Search/Exam
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(Electronic) Receipt
Search/Exam
Oct 26, 2021
Amended claims with annotations
Search/Exam
Oct 26, 2021
Claims
Search/Exam
Oct 26, 2021
Letter accompanying subsequently filed items
Search/Exam
Oct 26, 2021
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Intention to grant (signatures)
Search/Exam
Jun 17, 2021
Text intended for grant (clean copy)
Search/Exam
Jun 17, 2021
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(Electronic) Receipt
Search/Exam
Nov 18, 2020
Amended description with annotations
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Nov 18, 2020
Description
Search/Exam
Nov 18, 2020
Letter accompanying subsequently filed items
Search/Exam
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Annex to the communication
Search/Exam
Jul 20, 2020
Communication from the Examining Division
Search/Exam
May 7, 2020
Examination started
Search/Exam
Dec 30, 2019
(Electronic) Receipt
Search/Exam
Dec 30, 2019
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Amended claims with annotations
Search/Exam
Dec 30, 2019
Amendments received before examination
Search/Exam
Dec 30, 2019
Letter accompanying subsequently filed items
Search/Exam
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Letter which had not been notified
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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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Communication to designated inventor
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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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Communication to designated inventor
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Jun 12, 2019
(Electronic) Receipt
Search/Exam
Jun 12, 2019
Letter accompanying subsequently filed items
Search/Exam
Jun 12, 2019
Submission concerning representation
Search/Exam
Jun 11, 2019
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(Electronic) Receipt
Search/Exam
May 31, 2019
Request for entry into the European phase
Search/Exam
Mar 22, 2019
Information on entry into European phase
Search/Exam
Jun 4, 2018
May 17, 2018
Copy of the international search report
Search/Exam
May 17, 2018
Published international application - A1
Search/Exam
Jan 18, 2018
ISR: cited documents
PCTISA
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Dec 11, 2017
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Abstract
PCTISA
Nov 6, 2017
Annex
PCTISA
Nov 6, 2017
Claims
PCTISA
Nov 6, 2017
Description
PCTISA
Nov 6, 2017
Drawings
PCTISA
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