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The patent EP3755682 was granted to Shell Internationale Research Maatschappij on Jan 18, 2023. The application was filed on Feb 19, 2019 under application number EP19706564A. 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 |
|---|---|---|---|
| HOFFMANN EITLE | Oct 16, 2023 | HOFFMANN EITLE | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US2011312050 |
| DESCRIPTION | WO2016091751 |
| INTERNATIONAL-SEARCH-REPORT | US2993840 |
| INTERNATIONAL-SEARCH-REPORT | WO2016091751 |
| OPPOSITION | GB1257558 |
| OPPOSITION | US3999943 |
| OPPOSITION | US5557016 |
| OPPOSITION | WO2007144360 |
| OPPOSITION | WO2010014183 |
| OPPOSITION | WO2016091751 |
| OPPOSITION | WO2016162316 |
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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Oct 9, 2025
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Sep 19, 2025
(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
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Reply to appeal
Appeal
Jul 25, 2025
(Electronic) Receipt
Appeal
Jul 25, 2025
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Reply to appeal
Appeal
Jun 23, 2025
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(Electronic) Receipt
Appeal
Mar 25, 2025
(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
Jan 23, 2025
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Notice of appeal
Appeal
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(Electronic) Receipt
Appeal
Jan 15, 2025
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Notice of appeal
Appeal
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Means of redress
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Decision to grant a European patent
Search/Exam
Dec 8, 2022
(Electronic) Receipt
Search/Exam
Dec 8, 2022
French translation of claims
Search/Exam
Dec 8, 2022
German translation of the claims
Search/Exam
Dec 8, 2022
Letter accompanying subsequently filed items
Search/Exam
Nov 10, 2022
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Intention to grant (signatures)
Search/Exam
Nov 10, 2022
Text intended for grant (clean copy)
Search/Exam
Nov 10, 2022
Oct 4, 2022
Examination started
Search/Exam
Apr 7, 2021
(Electronic) Receipt
Search/Exam
Apr 7, 2021
Apr 7, 2021
Amended claims with annotations
Search/Exam
Apr 7, 2021
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Amended description with annotations
Search/Exam
Apr 7, 2021
Amendments received before examination
Search/Exam
Apr 7, 2021
Letter accompanying subsequently filed items
Search/Exam
Dec 2, 2020
Sep 29, 2020
Sep 25, 2020
Communication to designated inventor
Search/Exam
Sep 25, 2020
Communication to designated inventor
Search/Exam
Sep 7, 2020
Aug 19, 2020
(Electronic) Receipt
Search/Exam
Aug 19, 2020
Aug 19, 2020
Request for entry into the European phase
Search/Exam
Jul 3, 2020
Information on entry into European phase
Search/Exam
Sep 16, 2019
Aug 29, 2019
Copy of the international search report
Search/Exam
Aug 29, 2019
Published international application - A1
Search/Exam
Mar 20, 2019
Mar 7, 2019
Feb 19, 2019
(Electronic) Receipt
PCTRO
Feb 19, 2019
Abstract
PCTRO
Feb 19, 2019
Claims
PCTRO
Feb 19, 2019
Description
PCTRO
Feb 19, 2019
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PCTRO
Feb 19, 2019