The weekly litigation news digest is live. Subscribe now
The patent EP2449025 was granted to DOW on Apr 5, 2017. The application was filed on Jun 30, 2010 under application number EP10729769A. 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 |
|---|---|---|---|
| TOTALENERGIES ONETECH BELGIUM | Jan 5, 2018 | GARCIA MARTIN | ADMISSIBLE |
| TOTALENERGIES ONE TECH BELGIUM | Jan 5, 2018 | GARCIA MARTIN | ADMISSIBLE |
| BOREALIS | Dec 21, 2017 | MAIWALD | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US3485706 |
| DESCRIPTION | US4322027 |
| DESCRIPTION | US4340563 |
| DESCRIPTION | US4413110 |
| DESCRIPTION | US4663220 |
| DESCRIPTION | US4668566 |
| DESCRIPTION | US5844045 |
| DESCRIPTION | US5869575 |
| DESCRIPTION | US6448341 |
| DESCRIPTION | US6538070 |
| DESCRIPTION | US6545088 |
| DESCRIPTION | US6566446 |
| EXAMINATION | WO2007136506 |
| INTERNATIONAL-SEARCH-REPORT | US2004010103 |
| INTERNATIONAL-SEARCH-REPORT | WO2006081116 |
| INTERNATIONAL-SEARCH-REPORT | WO2007136493 |
| INTERNATIONAL-SEARCH-REPORT | WO2009067337 |
| OPPOSITION | US2003088037 |
| OPPOSITION | US2003139546 |
| OPPOSITION | US3914342 |
| OPPOSITION | US5977251 |
| OPPOSITION | US6319989 |
| OPPOSITION | WO2007136496 |
| OPPOSITION | WO2007136506 |
| OPPOSITION | WO2009064404 |
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
Get instant alerts for new documents
Aug 14, 2025
Aug 14, 2025
Aug 11, 2025
(Electronic) Receipt
Appeal
Aug 11, 2025
Aug 11, 2025
Reply to appeal
Appeal
Jul 18, 2025
Jul 18, 2025
Jul 18, 2025
Jul 18, 2025
Jul 15, 2025
(Electronic) Receipt
Appeal
Jul 15, 2025
Jul 15, 2025
Jul 15, 2025
Reply to appeal
Appeal
Jul 2, 2025
Jul 2, 2025
Jul 2, 2025
Jun 25, 2025
Jun 25, 2025
Jun 25, 2025
Jun 25, 2025
Jun 25, 2025
Apr 11, 2025
Apr 11, 2025
Apr 8, 2025
(Electronic) Receipt
Appeal
Apr 8, 2025
Apr 8, 2025
Jan 24, 2025
Jan 24, 2025
Jan 24, 2025
Jan 22, 2025
(Electronic) Receipt
Appeal
Jan 22, 2025
Jan 22, 2025
Notice of appeal
Appeal
Dec 12, 2024
Dec 12, 2024
Dec 12, 2024
Dec 12, 2024
Dec 12, 2024
Dec 12, 2024
Dec 12, 2024
Dec 12, 2024
Dec 12, 2024
Dec 12, 2024
Means of redress
OPPO
Dec 12, 2024
Dec 12, 2024
Dec 12, 2024
Dec 12, 2024
Dec 12, 2024
Nov 19, 2024
Nov 15, 2024
Nov 15, 2024
Nov 14, 2024
Nov 14, 2024
Nov 14, 2024
Oct 28, 2024
Sep 26, 2024
Sep 26, 2024
Sep 26, 2024
Sep 24, 2024
Sep 24, 2024
Sep 19, 2024
Sep 19, 2024
Sep 19, 2024
Sep 19, 2024
Sep 19, 2024
Sep 19, 2024
Sep 19, 2024
Sep 19, 2024
Sep 17, 2024
Sep 17, 2024
Sep 17, 2024
Sep 17, 2024
Sep 13, 2024
Sep 13, 2024
Sep 10, 2024
Sep 10, 2024
Sep 10, 2024
Mar 19, 2024
Mar 19, 2024
Mar 19, 2024
Mar 19, 2024
Mar 19, 2024
Mar 19, 2024
Mar 19, 2024
Mar 19, 2024
Mar 19, 2024
Feb 27, 2024
Feb 27, 2024
Feb 21, 2024
Feb 21, 2024
Feb 21, 2024
Feb 21, 2024
Feb 21, 2024
Feb 16, 2024
Feb 16, 2024
Feb 16, 2024
Feb 16, 2024
Feb 16, 2024
Feb 16, 2024
Feb 16, 2024
Feb 16, 2024
Feb 16, 2024
Feb 2, 2024
Feb 2, 2024
Jan 30, 2024
Jan 30, 2024
Jan 30, 2024
Jan 30, 2024
Jan 30, 2024
Jan 30, 2024
Jul 31, 2023
Jul 31, 2023
Jul 24, 2023
Jul 24, 2023
Jul 24, 2023
Jul 24, 2023
Jul 24, 2023
Jul 24, 2023
Jul 24, 2023
Jul 24, 2023
Jul 24, 2023
Jul 24, 2023
Jul 24, 2023
Jul 24, 2023
Jul 24, 2023
Jul 24, 2023
Jul 24, 2023
Jul 24, 2023
Jan 20, 2023
Jan 20, 2023
Jan 20, 2023
Jan 20, 2023
Jan 18, 2023
Jan 18, 2023
Jan 18, 2023
Jan 18, 2023
Jan 9, 2023
Jan 9, 2023
Jan 7, 2023
(Electronic) Receipt
Appeal
Jan 7, 2023
Jan 7, 2023
Jan 3, 2023
Jan 3, 2023
Jan 3, 2023
Dec 22, 2022
(Electronic) Receipt
Appeal
Dec 22, 2022
Dec 22, 2022
Dec 22, 2022
Dec 20, 2022
(Electronic) Receipt
Appeal
Dec 20, 2022
Dec 19, 2022
Dec 19, 2022
Dec 14, 2022
Dec 14, 2022
Dec 13, 2022
(Electronic) Receipt
Appeal
Dec 13, 2022
Dec 13, 2022
Dec 12, 2022
Dec 9, 2022
Dec 9, 2022
Dec 9, 2022
Nov 22, 2022
Nov 22, 2022
Nov 18, 2022
(Electronic) Receipt
Appeal
Nov 18, 2022
Nov 18, 2022
Nov 18, 2022
Nov 17, 2022
(Electronic) Receipt
Appeal
Nov 17, 2022
Nov 17, 2022
Oct 13, 2022
Oct 13, 2022
Oct 9, 2022
(Electronic) Receipt
Appeal
Oct 9, 2022
Oct 9, 2022
Oct 9, 2022
Oct 9, 2022
Oct 9, 2022
Oct 6, 2022
Oct 6, 2022
Oct 6, 2022
Jun 15, 2022
Jun 15, 2022
Jun 13, 2022
Advice of delivery
Appeal
Jun 10, 2022
(Electronic) Receipt
Appeal
Jun 10, 2022
Jun 10, 2022
Jun 10, 2022
Jun 10, 2022
Jun 9, 2022
Jun 9, 2022
Jun 9, 2022
Jun 3, 2022
Feb 7, 2022
Feb 7, 2022
Feb 7, 2022
Jan 31, 2022
Jan 31, 2022
Apr 8, 2021
Mar 1, 2021
Mar 1, 2021
Feb 24, 2021
(Electronic) Receipt
Appeal
Feb 24, 2021
Feb 24, 2021
Feb 24, 2021
Dec 18, 2020
Dec 18, 2020
Dec 15, 2020
(Electronic) Receipt
Appeal
Dec 15, 2020
Dec 15, 2020
Feb 10, 2020
Feb 10, 2020
Feb 10, 2020
Feb 10, 2020
Feb 5, 2020
(Electronic) Receipt
Appeal
Feb 5, 2020
(Electronic) Receipt
Appeal
Feb 5, 2020
Feb 5, 2020
Feb 5, 2020
Feb 5, 2020
Feb 5, 2020
Feb 5, 2020
Feb 5, 2020
Feb 5, 2020
Feb 5, 2020
Feb 5, 2020
Reply to appeal
Appeal
Feb 5, 2020
Reply to appeal
Appeal
Nov 13, 2019
Oct 21, 2019
Sep 25, 2019
Sep 25, 2019
Sep 19, 2019
(Electronic) Receipt
Appeal
Sep 19, 2019
Sep 19, 2019
Sep 19, 2019
Sep 19, 2019
Sep 19, 2019
Sep 19, 2019
Sep 19, 2019
Jul 19, 2019
Jul 19, 2019
Jul 19, 2019
Jul 15, 2019
Processing of an appeal
Appeal
Jul 9, 2019
(Electronic) Receipt
Appeal
Jul 9, 2019
Jul 9, 2019
Notice of appeal
Appeal
May 28, 2019
May 17, 2019
May 16, 2019
May 14, 2019
May 14, 2019
May 9, 2019
May 9, 2019
May 9, 2019
May 9, 2019
May 9, 2019
May 9, 2019
May 9, 2019
May 9, 2019
May 9, 2019
May 9, 2019
Means of redress
OPPO
May 9, 2019
May 9, 2019
May 9, 2019
May 9, 2019
Apr 11, 2019
Apr 11, 2019
Apr 10, 2019
Apr 8, 2019
Apr 8, 2019
Apr 8, 2019
Apr 8, 2019
Apr 8, 2019
Apr 8, 2019
Mar 11, 2019
Feb 18, 2019
Feb 18, 2019
Feb 18, 2019
Feb 18, 2019
Feb 18, 2019
Feb 18, 2019
Feb 13, 2019
Feb 8, 2019
Feb 8, 2019
Feb 8, 2019
Feb 8, 2019
Feb 8, 2019
Feb 8, 2019
Feb 8, 2019
Feb 8, 2019
Feb 7, 2019
Feb 7, 2019
Feb 7, 2019
Feb 4, 2019
Feb 4, 2019
Feb 4, 2019
Jan 29, 2019
Jan 29, 2019
Jan 18, 2019
Jan 18, 2019
Jan 18, 2019
Oct 18, 2018
Oct 4, 2018
Oct 2, 2018
Sep 28, 2018
Sep 25, 2018
Sep 21, 2018
Sep 19, 2018
Sep 19, 2018
Sep 19, 2018
Sep 19, 2018
Sep 19, 2018
Sep 19, 2018
Sep 19, 2018
Sep 19, 2018
Sep 19, 2018
Jul 3, 2018
Jun 4, 2018
Jun 4, 2018
May 29, 2018
May 29, 2018
May 29, 2018
Claims
OPPO
May 29, 2018
May 29, 2018
May 3, 2018
May 3, 2018
May 3, 2018
Apr 20, 2018
Jan 19, 2018
Jan 19, 2018
Jan 19, 2018
Jan 11, 2018
Jan 5, 2018
Jan 5, 2018
Jan 5, 2018
Jan 5, 2018
Jan 4, 2018
Dec 21, 2017
Dec 21, 2017
Dec 21, 2017
Apr 5, 2017
Mar 9, 2017
Decision to grant a European patent
Search/Exam
Feb 21, 2017
(Electronic) Receipt
Search/Exam
Feb 21, 2017
Filing of the translations of the claims
Search/Exam
Feb 21, 2017
French translation of claims
Search/Exam
Feb 21, 2017
German translation of the claims
Search/Exam
Feb 21, 2017
Letter accompanying subsequently filed items
Search/Exam
Oct 12, 2016
Oct 12, 2016
Oct 12, 2016
Intention to grant (signatures)
Search/Exam
Oct 12, 2016
Text intended for grant
Search/Exam
Sep 27, 2016
Sep 21, 2016
(Electronic) Receipt
Search/Exam
Sep 21, 2016
Letter accompanying subsequently filed items
Search/Exam
Sep 21, 2016
Sep 14, 2016
Sep 14, 2016
Sep 14, 2016
Intention to grant (signatures)
Search/Exam
Sep 14, 2016
Text intended for grant (clean copy)
Search/Exam
Sep 14, 2016
Sep 6, 2016
Aug 11, 2016
(Electronic) Receipt
Search/Exam
Aug 11, 2016
Letter accompanying subsequently filed items
Search/Exam
Aug 11, 2016
Aug 3, 2016
Aug 3, 2016
Aug 3, 2016
Intention to grant (signatures)
Search/Exam
Aug 3, 2016
Text intended for grant (clean copy)
Search/Exam
Aug 3, 2016
Feb 2, 2016
(Electronic) Receipt
Search/Exam
Feb 2, 2016
Amended claims with annotations
Search/Exam
Feb 2, 2016
Amended description with annotations
Search/Exam
Feb 2, 2016
Claims
Search/Exam
Feb 2, 2016
Description
Search/Exam
Feb 2, 2016
Letter accompanying subsequently filed items
Search/Exam
Feb 2, 2016
Sep 28, 2015
Annex to the communication
Search/Exam
Sep 28, 2015
Communication from the Examining Division
Search/Exam
Feb 13, 2015
Jan 30, 2015
Oct 1, 2014
Claims
Search/Exam
Oct 1, 2014
Description
Search/Exam
Oct 1, 2014
Drawings
Search/Exam
Oct 1, 2014
May 27, 2014
Annex to the communication
Search/Exam
May 27, 2014
Communication from the Examining Division
Search/Exam
Oct 2, 2013
Description
Search/Exam
Oct 2, 2013
Aug 13, 2013
Aug 5, 2013
Mar 26, 2013
Annex to the communication
Search/Exam
Mar 26, 2013
Communication from the Examining Division
Search/Exam
Aug 20, 2012
Aug 20, 2012
Amendments received before examination
Search/Exam
Apr 12, 2012
Feb 9, 2012
Jan 12, 2012
Jan 12, 2012
Dec 28, 2011
(Electronic) Receipt
Search/Exam
Dec 28, 2011
Annex
Search/Exam
Dec 28, 2011
Letter accompanying subsequently filed items
Search/Exam
Dec 20, 2011
(Electronic) Receipt
Search/Exam
Dec 20, 2011
Annex
Search/Exam
Dec 20, 2011
Annex
Search/Exam
Dec 20, 2011
Annex
Search/Exam
Dec 20, 2011
Annex
Search/Exam
Dec 20, 2011
Annex
Search/Exam
Dec 20, 2011
Request for entry into the European phase
Search/Exam
Nov 29, 2011
Letter which had not been notified
Search/Exam
Nov 11, 2011
Information on entry into European phase
Search/Exam
Sep 27, 2011
Sep 27, 2011
Sep 27, 2011
Sep 27, 2011
Sep 27, 2011
Sep 27, 2011
Sep 27, 2011
Sep 27, 2011
Sep 27, 2011
May 5, 2011
Copy of the international search report
Search/Exam
May 5, 2011
Apr 18, 2011
Apr 18, 2011
Apr 18, 2011
Apr 12, 2011
Notification of election of EPO
Search/Exam
Mar 24, 2011
Mar 24, 2011
Mar 7, 2011
Mar 7, 2011
Mar 7, 2011
Mar 7, 2011
Feb 28, 2011
Feb 28, 2011
Feb 28, 2011
Notification of the recording of a change
Search/Exam
Feb 28, 2011
Notification of the recording of a change
Search/Exam
Feb 23, 2011
Abstract
PCT2
Feb 23, 2011
Abstract
PCT2
Feb 23, 2011
Annex
PCT2
Feb 23, 2011
Drawings
PCT2
Feb 23, 2011
PCT demand form
PCT2
Feb 23, 2011
Feb 23, 2011
Feb 23, 2011
Feb 7, 2011
Jan 6, 2011
Published international application - A2
Search/Exam
Jul 8, 2010
Abstract
PCTISA
Jul 8, 2010
Claims
PCTISA
Jul 8, 2010
Description
PCTISA