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The patent EP3189073 was granted to Cellectis on Jun 11, 2025. The application was filed on Sep 3, 2015 under application number EP15757289A. The patent is currently recorded with a legal status of "Patent Maintained As Amended".

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 |
|---|---|---|---|
| OXFORD BIOMEDICA UK | Sep 24, 2020 | D YOUNG | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | EP0239400 |
| DESCRIPTION | EP0519596 |
| DESCRIPTION | EP0592106 |
| DESCRIPTION | US2005042664 |
| DESCRIPTION | US2005048617 |
| DESCRIPTION | US2006121005 |
| DESCRIPTION | US4683195 |
| DESCRIPTION | US5037743 |
| DESCRIPTION | US5143830 |
| DESCRIPTION | US5225539 |
| DESCRIPTION | US5530101 |
| DESCRIPTION | US5565332 |
| DESCRIPTION | US5585089 |
| DESCRIPTION | US5766886 |
| DESCRIPTION | US5858358 |
| DESCRIPTION | US5883223 |
| DESCRIPTION | US6352694 |
| DESCRIPTION | US6407213 |
| DESCRIPTION | US6534055 |
| DESCRIPTION | US6692964 |
| DESCRIPTION | US6797514 |
| DESCRIPTION | US6867041 |
| DESCRIPTION | US6887466 |
| DESCRIPTION | US6905680 |
| DESCRIPTION | US6905681 |
| DESCRIPTION | US6905874 |
| DESCRIPTION | US7067318 |
| DESCRIPTION | US7144575 |
| DESCRIPTION | US7172869 |
| DESCRIPTION | US7175843 |
| DESCRIPTION | US7232566 |
| DESCRIPTION | WO2012138927 |
| DESCRIPTION | WO2013176915 |
| DESCRIPTION | WO2014039523 |
| DESCRIPTION | WO9109967 |
| DESCRIPTION | WO9317105 |
| INTERNATIONAL-SEARCH-REPORT | WO2012079000 |
| INTERNATIONAL-SEARCH-REPORT | WO2013123061 |
| INTERNATIONAL-SEARCH-REPORT | WO2013176915 |
| INTERNATIONAL-SEARCH-REPORT | WO2014100385 |
| OPPOSITION | US2007231333 |
| OPPOSITION | US2013266551 |
| OPPOSITION | US2014234348 |
| OPPOSITION | WO2006031653 |
| OPPOSITION | WO2007106744 |
| OPPOSITION | WO2012079000 |
| OPPOSITION | WO2013033626 |
| OPPOSITION | WO2013059593 |
| OPPOSITION | WO2013123061 |
| OPPOSITION | WO2013176915 |
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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May 15, 2025
May 15, 2025
Apr 30, 2025
Apr 30, 2025
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Feb 7, 2025
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Feb 5, 2025
Refund of fees
Appeal
Feb 3, 2025
Jan 30, 2025
Jan 29, 2025
Jan 29, 2025
Jan 28, 2025
(Electronic) Receipt
Appeal
Jan 28, 2025
Jan 28, 2025
Jan 28, 2025
Refund of fees
Appeal
Jan 28, 2025
Withdrawal of an appeal
Appeal
Jan 10, 2025
(Electronic) Receipt
Appeal
Jan 10, 2025
Jan 10, 2025
Jan 10, 2025
Withdrawal of an appeal
Appeal
Jan 8, 2025
(Electronic) Receipt
Appeal
Jan 8, 2025
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(Electronic) Receipt
Appeal
Oct 13, 2023
Oct 13, 2023
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Sep 5, 2023
(Electronic) Receipt
Appeal
Sep 5, 2023
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Reply to appeal
Appeal
Aug 28, 2023
Aug 22, 2023
(Electronic) Receipt
Appeal
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Reply to appeal
Appeal
Apr 26, 2023
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(Electronic) Receipt
Appeal
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Appeal
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(Electronic) Receipt
Appeal
Feb 23, 2023
(Electronic) Receipt
Appeal
Feb 23, 2023
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Notice of appeal
Appeal
Feb 23, 2023
Notice of appeal
Appeal
Jan 23, 2023
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OPPO
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OPPO
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Refund of fees
OPPO
Oct 1, 2020
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Jan 3, 2020
Nov 28, 2019
Decision to grant a European patent
Search/Exam
Nov 8, 2019
(Electronic) Receipt
Search/Exam
Nov 8, 2019
Filing of the translations of the claims
Search/Exam
Nov 8, 2019
French translation of claims
Search/Exam
Nov 8, 2019
German translation of the claims
Search/Exam
Nov 8, 2019
Letter accompanying subsequently filed items
Search/Exam
Sep 18, 2019
Change to the inventor details
Search/Exam
Sep 10, 2019
Letter accompanying subsequently filed items
Search/Exam
Sep 10, 2019
Letter concerning the inventor
Search/Exam
Jul 19, 2019
Jul 19, 2019
Jul 19, 2019
Intention to grant (signatures)
Search/Exam
Jul 19, 2019
Text intended for grant (clean copy)
Search/Exam
Jul 19, 2019
Text intended for grant (sequence listing)
Search/Exam
Jul 19, 2019
Apr 24, 2019
(Electronic) Receipt
Search/Exam
Apr 24, 2019
Amended description with annotations
Search/Exam
Apr 24, 2019
Description
Search/Exam
Apr 24, 2019
Letter accompanying subsequently filed items
Search/Exam
Apr 24, 2019
Mar 4, 2019
Annex to the communication
Search/Exam
Mar 4, 2019
Communication from the Examining Division
Search/Exam
Sep 24, 2018
(Electronic) Receipt
Search/Exam
Sep 24, 2018
Amended claims with annotations
Search/Exam
Sep 24, 2018
Claims
Search/Exam
Sep 24, 2018
Letter accompanying subsequently filed items
Search/Exam
Sep 24, 2018
Jun 13, 2018
Jun 7, 2018
(Electronic) Receipt
Search/Exam
Jun 7, 2018
Letter accompanying subsequently filed items
Search/Exam
Jun 7, 2018
Mar 15, 2018
Annex to the communication
Search/Exam
Mar 15, 2018
Communication from the Examining Division
Search/Exam
Mar 7, 2018
Examination started
Search/Exam
Oct 20, 2017
(Electronic) Receipt
Search/Exam
Oct 20, 2017
Oct 20, 2017
Amended claims with annotations
Search/Exam
Oct 20, 2017
Amendments received before examination
Search/Exam
Oct 20, 2017
Letter accompanying subsequently filed items
Search/Exam
Jun 14, 2017
Apr 13, 2017
Apr 11, 2017
Communication to designated inventor
Search/Exam
Apr 6, 2017
Priority search results copy provided by EPO
Search/Exam
Apr 3, 2017
(Electronic) Receipt
Search/Exam
Apr 3, 2017
Apr 3, 2017
Amended claims with annotations
Search/Exam
Apr 3, 2017
Amendments received before examination
Search/Exam
Apr 3, 2017
Request for entry into the European phase
Search/Exam
Mar 23, 2017
Jan 13, 2017
Information on entry into European phase
Search/Exam
May 3, 2016
May 3, 2016
May 3, 2016
Notification of the recording of a change
Search/Exam
Mar 30, 2016
Mar 10, 2016
Converted Sequence Listing
Search/Exam
Mar 10, 2016
Copy of the international search report
Search/Exam
Mar 10, 2016
Published international application - A1
Search/Exam
Nov 11, 2015
ISR: cited documents
PCTISA
Nov 10, 2015
Nov 10, 2015
Nov 10, 2015
Oct 6, 2015
(Electronic) Receipt
PCTRO
Oct 6, 2015
Oct 6, 2015
Oct 6, 2015
Sep 15, 2015
Sep 15, 2015
Sep 14, 2015
Sep 14, 2015
Sep 9, 2015
Sep 3, 2015
(Electronic) Receipt
PCTRO
Sep 3, 2015
Abstract
PCTRO
Sep 3, 2015
Claims
PCTRO
Sep 3, 2015
Description
PCTRO
Sep 3, 2015
Sep 3, 2015
Drawings
PCTRO
Sep 3, 2015