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The patent EP3994236 was granted to Neste OYJ on Sep 14, 2022. The application was filed on Nov 18, 2020 under application number EP20810899A. 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 |
|---|---|---|---|
| HONEYWELL ENI | Jun 13, 2023 | HOUGHTON | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | WO2005026297 |
| DESCRIPTION | WO2018224730 |
| EXAMINATION | EP2141217 |
| INTERNATIONAL-SEARCH-REPORT | EP2141217 |
| OPPOSITION | US2017009144 |
| OPPOSITION | WO2021099343 |
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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Dec 3, 2025
Dec 3, 2025
Oct 29, 2025
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(Electronic) Receipt
Appeal
Oct 24, 2025
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Reply to appeal
Appeal
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(Electronic) Receipt
Appeal
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Apr 10, 2025
(Electronic) Receipt
Appeal
Apr 10, 2025
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Notice of appeal
Appeal
Feb 20, 2025
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Means of redress
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Decision to grant a European patent
Search/Exam
Aug 3, 2022
(Electronic) Receipt
Search/Exam
Aug 3, 2022
French translation of claims
Search/Exam
Aug 3, 2022
German translation of the claims
Search/Exam
Aug 3, 2022
Letter accompanying subsequently filed items
Search/Exam
Jul 27, 2022
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Free text
PCT2
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Intention to grant (signatures)
Search/Exam
Apr 6, 2022
Text intended for grant (clean copy)
Search/Exam
Apr 6, 2022
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Examination started
Search/Exam
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(Electronic) Receipt
Search/Exam
Feb 2, 2022
(Electronic) Receipt
Search/Exam
Feb 2, 2022
Letter accompanying subsequently filed items
Search/Exam
Feb 2, 2022
Priority search results
Search/Exam
Feb 2, 2022
Request for entry into the European phase
Search/Exam
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PCT demand form
PCT2
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Copy of the international search report
Search/Exam
May 27, 2021
Published international application - A1
Search/Exam
Feb 24, 2021
ISR: cited documents
PCTISA
Feb 24, 2021
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(Electronic) Receipt
PCTRO
Nov 18, 2020
Abstract
PCTRO
Nov 18, 2020
Claims
PCTRO
Nov 18, 2020
Description
PCTRO
Nov 18, 2020
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