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The patent EP3511446 was granted to Lenzing on Nov 27, 2024. The application was filed on Jan 15, 2018 under application number EP18151674A. 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 |
|---|---|---|---|
| ANDRITZ | Aug 27, 2025 | PRIMROSE | ADMISSIBLE |
| TABUJEW | Aug 27, 2025 | TABUJEW | ADMISSIBLE |
| UND RECHTSANWALT WEISS | Aug 26, 2025 | PATENTANWALTE UND RECHTSANWALT WEISS | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| OPPOSITION | CN101381899 |
| OPPOSITION | CN101974796 |
| OPPOSITION | CN102154722 |
| OPPOSITION | CN103911742 |
| OPPOSITION | CN104026786 |
| OPPOSITION | CN113891970 |
| OPPOSITION | CN1341170 |
| OPPOSITION | CN1526863 |
| OPPOSITION | DE102013101199 |
| OPPOSITION | EP0726973 |
| OPPOSITION | US2005096399 |
| OPPOSITION | US2006096073 |
| OPPOSITION | US2011094691 |
| OPPOSITION | US2013330992 |
| OPPOSITION | US2018002837 |
| OPPOSITION | US8633120 |
| OPPOSITION | WO2005017247 |
| OPPOSITION | WO2014081291 |
| OPPOSITION | WO2017135816 |
| OPPOSITION | WO2018104330 |
| OPPOSITION | WO9607778 |
| OTHER | WO2018115428 |
| OTHER | WO9607778 |
| SEARCH | CN102154722 |
| SEARCH | WO2015049040 |
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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Dec 10, 2024
Oct 31, 2024
Decision to grant a European patent
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Oct 16, 2024
(Electronic) Receipt
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Oct 16, 2024
English translation of the claims
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Oct 16, 2024
French translation of claims
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Oct 16, 2024
Letter accompanying subsequently filed items
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Aug 26, 2024
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Non-patent literature filed by a third party
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Aug 20, 2024
Non-patent literature filed by a third party
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Non-patent literature filed by a third party
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Aug 20, 2024
Observations by third parties
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Intention to grant (signatures)
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Jun 17, 2024
Text intended for grant (clean copy)
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Jun 17, 2024
May 14, 2024
(Electronic) Receipt
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May 14, 2024
Amended claims with annotations
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May 14, 2024
Amended description with annotations
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May 14, 2024
Claims
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May 14, 2024
Description
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May 14, 2024
Letter accompanying subsequently filed items
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May 14, 2024
Apr 30, 2024
Annex to the communication
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Apr 30, 2024
Communication from the Examining Division
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Jan 12, 2023
(Electronic) Receipt
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Jan 12, 2023
Letter accompanying subsequently filed items
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Jan 5, 2022
(Electronic) Receipt
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Jan 5, 2022
Letter accompanying subsequently filed items
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Nov 10, 2021
(Electronic) Receipt
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Nov 10, 2021
Amended claims with annotations
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Nov 10, 2021
Claims
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Nov 10, 2021
Letter accompanying subsequently filed items
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Nov 10, 2021
Jul 1, 2021
Annex to the communication
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Jul 1, 2021
Communication from the Examining Division
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Jan 20, 2021
(Electronic) Receipt
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Jan 20, 2021
Letter accompanying subsequently filed items
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Dec 16, 2020
(Electronic) Receipt
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Dec 16, 2020
Amended claims with annotations
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Dec 16, 2020
Claims
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Dec 16, 2020
Letter accompanying subsequently filed items
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Dec 16, 2020
Aug 20, 2020
Annex to the communication
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Aug 20, 2020
Communication from the Examining Division
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Aug 12, 2020
Examination started
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Jan 15, 2020
(Electronic) Receipt
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Jan 15, 2020
Letter accompanying subsequently filed items
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Jan 14, 2020
(Electronic) Receipt
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Jan 14, 2020
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Amended claims with annotations
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Jan 14, 2020
Amendments received before examination
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Jan 14, 2020
Letter accompanying subsequently filed items
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Jul 22, 2019
Jun 19, 2019
Notification of forthcoming publication
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Jul 4, 2018
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European search opinion
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Jul 4, 2018
European search report
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Jul 4, 2018
Information on Search Strategy
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Jun 22, 2018
Search started
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Mar 9, 2018
Communication to designated inventor
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Mar 9, 2018
Communication to designated inventor
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Mar 9, 2018
Communication to designated inventor
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Jan 15, 2018
Abstract
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Jan 15, 2018
Jan 15, 2018
Claims
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Jan 15, 2018
Description
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Jan 15, 2018
Designation of inventor
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Jan 15, 2018
Drawings
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Jan 15, 2018
Request for grant of a European patent
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