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The patent EP4320309 was granted to Circulose on Nov 13, 2024. The application was filed on Jan 19, 2023 under application number EP23701419A. 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 |
|---|---|---|---|
| LENZING | Jul 16, 2025 | PATENT MANAGEMENT LENZING | ADMISSIBLE |
| SODRA SKOGSAGAMA EKONOMISK FORENING | Jul 16, 2025 | VALEA | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | EP0356419 |
| DESCRIPTION | EP0584318 |
| DESCRIPTION | US2020347520 |
| DESCRIPTION | WO2018073177 |
| DESCRIPTION | WO2018104330 |
| INTERNATIONAL-SEARCH-REPORT | WO2018073177 |
| INTERNATIONAL-SEARCH-REPORT | WO2018104330 |
| OPPOSITION | US2020347520 |
| OPPOSITION | US2021062369 |
| OPPOSITION | WO2015077807 |
| OPPOSITION | WO2016123643 |
| OPPOSITION | WO2018073177 |
| OPPOSITION | WO2018104330 |
| OPPOSITION | WO2020127453 |
| OPPOSITION | WO2021006798 |
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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(Electronic) Receipt
Search/Exam
Sep 20, 2024
Annex
Search/Exam
Sep 20, 2024
Annex
Search/Exam
Sep 20, 2024
Interruption of proceedings
Search/Exam
Sep 20, 2024
Letter accompanying subsequently filed items
Search/Exam
Sep 19, 2024
Communication from the Legal Division
Search/Exam
Sep 19, 2024
Decision to grant a European patent
Search/Exam
Sep 6, 2024
(Electronic) Receipt
Search/Exam
Sep 6, 2024
French translation of claims
Search/Exam
Sep 6, 2024
German translation of the claims
Search/Exam
Sep 6, 2024
Letter accompanying subsequently filed items
Search/Exam
Aug 27, 2024
Annex
Search/Exam
Aug 27, 2024
Annexes in respect of a client data request
Search/Exam
Aug 27, 2024
Annexes in respect of a client data request
Search/Exam
Aug 27, 2024
Annexes in respect of a client data request
Search/Exam
Aug 27, 2024
Interruption of proceedings
Search/Exam
Aug 27, 2024
Letter accompanying subsequently filed items
Search/Exam
Jul 29, 2024
May 14, 2024
May 14, 2024
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May 14, 2024
Intention to grant (signatures)
Search/Exam
May 14, 2024
Text intended for grant (clean copy)
Search/Exam
May 14, 2024
Apr 22, 2024
Examination started
Search/Exam
Jan 17, 2024
Nov 14, 2023
Nov 7, 2023
(Electronic) Receipt
Search/Exam
Nov 7, 2023
Nov 7, 2023
Amended claims with annotations
Search/Exam
Nov 7, 2023
Request for entry into the European phase
Search/Exam
Nov 2, 2023
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Nov 2, 2023
Oct 19, 2023
Notification of election of EPO
Search/Exam
Oct 9, 2023
Oct 2, 2023
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Oct 2, 2023
PCT demand form
PCT2
Sep 21, 2023
Sep 11, 2023
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Aug 14, 2023
Jul 27, 2023
Copy of the international search report
Search/Exam
Jul 27, 2023
Published international application - A1
Search/Exam
Feb 22, 2023
(Electronic) Receipt
PCTRO
Feb 22, 2023
Feb 22, 2023
Feb 2, 2023
Jan 19, 2023
(Electronic) Receipt
PCTRO
Jan 19, 2023
Abstract
PCTRO
Jan 19, 2023
Claims
PCTRO
Jan 19, 2023
Description
PCTRO
Jan 19, 2023
Jan 19, 2023
Drawings
PCTRO
Jan 19, 2023