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The patent EP3824053 was granted to Neste OYJ on Aug 31, 2022. The application was filed on Jul 19, 2019 under application number EP19742575A. 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 |
|---|---|---|---|
| UPM KYMMENE | May 30, 2023 | HOFFMANN EITLE | ADMISSIBLE |
| CALYSTA | May 25, 2023 | CALYSTA | ADMISSIBLE |
| KRAUS & LEDERER PARTGMBB | Mar 14, 2023 | KRAUS & LEDERER PARTGMBB | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| EXAMINATION | CA894222 |
| EXAMINATION | EP0420651 |
| EXAMINATION | EP0420652 |
| EXAMINATION | US4328128 |
| INTERNATIONAL-SEARCH-REPORT | EP0574272 |
| INTERNATIONAL-SEARCH-REPORT | US2005101761 |
| INTERNATIONAL-SEARCH-REPORT | US2013090502 |
| INTERNATIONAL-SEARCH-REPORT | US2016060540 |
| INTERNATIONAL-SEARCH-REPORT | US4151072 |
| INTERNATIONAL-SEARCH-REPORT | US5049258 |
| OPPOSITION | CN105001910 |
| OPPOSITION | EP0574272 |
| OPPOSITION | JP2003034794 |
| OPPOSITION | JP2007224196 |
| OPPOSITION | JP2010070649 |
| OPPOSITION | WO2009117337 |
| OPPOSITION | WO2012069467 |
| OPPOSITION | WO2014001632 |
| OPPOSITION | WO2018025104 |
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 18, 2025
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
Aug 11, 2025
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Reply to appeal
Appeal
Aug 1, 2025
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Jul 28, 2025
(Electronic) Receipt
Appeal
Jul 28, 2025
Jul 28, 2025
Reply to appeal
Appeal
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
Feb 7, 2025
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Notice of appeal
Appeal
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Decision to grant a European patent
Search/Exam
Jul 21, 2022
(Electronic) Receipt
Search/Exam
Jul 21, 2022
Filing of the translations of the claims
Search/Exam
Jul 21, 2022
French translation of claims
Search/Exam
Jul 21, 2022
German translation of the claims
Search/Exam
Mar 30, 2022
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Mar 30, 2022
Intention to grant (signatures)
Search/Exam
Mar 30, 2022
Text intended for grant (clean copy)
Search/Exam
Mar 30, 2022
Feb 25, 2022
Examination started
Search/Exam
Sep 2, 2021
(Electronic) Receipt
Search/Exam
Sep 2, 2021
Sep 2, 2021
Amended claims with annotations
Search/Exam
Sep 2, 2021
Amendments received before examination
Search/Exam
Sep 2, 2021
Letter accompanying subsequently filed items
Search/Exam
Apr 29, 2021
Mar 2, 2021
Feb 26, 2021
Communication to designated inventor
Search/Exam
Feb 26, 2021
Communication to designated inventor
Search/Exam
Feb 26, 2021
Communication to designated inventor
Search/Exam
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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
Search/Exam
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Communication to designated inventor
Search/Exam
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Communication to designated inventor
Search/Exam
Feb 26, 2021
Communication to designated inventor
Search/Exam
Feb 18, 2021
(Electronic) Receipt
Search/Exam
Feb 18, 2021
Priority search results
Search/Exam
Feb 18, 2021
Request for entry into the European phase
Search/Exam
Jan 25, 2021
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Dec 10, 2020
Information on entry into European phase
Search/Exam
Jul 15, 2020
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Notification of election of EPO
Search/Exam
May 27, 2020
May 19, 2020
PCT demand form
PCT2
May 19, 2020
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Feb 17, 2020
Jan 30, 2020
Copy of the international search report
Search/Exam
Jan 30, 2020
Published international application - A1
Search/Exam
Oct 4, 2019
(Electronic) Receipt
PCTRO
Oct 4, 2019
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Aug 5, 2019
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Jul 19, 2019
(Electronic) Receipt
PCTRO
Jul 19, 2019
Abstract
PCTRO
Jul 19, 2019
Claims
PCTRO
Jul 19, 2019
Description
PCTRO
Jul 19, 2019
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Drawings
PCTRO
Jul 19, 2019