The weekly litigation news digest is live. Subscribe now
The patent EP2271725 was granted to E I DU Pont DE Nemours on Feb 21, 2018. The application was filed on May 7, 2009 under application number EP09743644A. The patent is currently recorded with a legal status of "Revoked".

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 |
|---|---|---|---|
| DAIKIN INDUSTRIES | Nov 21, 2018 | HOFFMANN EITLE | WITHDRAWN |
| AGC | Nov 20, 2018 | MULLER BORE & PARTNER PATENTANWALTE PARTG MBB | ADMISSIBLE |
| MEXICHEM FLUOR DE CV | Nov 19, 2018 | POTTER CLARKSON | WITHDRAWN |
| ARKEMA FRANCE | Nov 16, 2018 | BANDPAY & GREUTER | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | GB2439392 |
| INTERNATIONAL-SEARCH-REPORT | US2005233932 |
| INTERNATIONAL-SEARCH-REPORT | US2006243944 |
| INTERNATIONAL-SEARCH-REPORT | US2007007488 |
| INTERNATIONAL-SEARCH-REPORT | US2007010592 |
| INTERNATIONAL-SEARCH-REPORT | US2007187639 |
| INTERNATIONAL-SEARCH-REPORT | US2008058562 |
| INTERNATIONAL-SEARCH-REPORT | US2008098755 |
| INTERNATIONAL-SEARCH-REPORT | US5705716 |
| INTERNATIONAL-SEARCH-REPORT | US6329559 |
| INTERNATIONAL-SEARCH-REPORT | US6759381 |
| INTERNATIONAL-SEARCH-REPORT | WO2007079431 |
| INTERNATIONAL-SEARCH-REPORT | WO2008054781 |
| INTERNATIONAL-SEARCH-REPORT | WO2008054782 |
| INTERNATIONAL-SEARCH-REPORT | WO2008121785 |
| INTERNATIONAL-SEARCH-REPORT | WO2008121790 |
| INTERNATIONAL-SEARCH-REPORT | WO2009003084 |
| INTERNATIONAL-SEARCH-REPORT | WO2009018561 |
| OPPOSITION | EP2149543 |
| OPPOSITION | EP2481720 |
| OPPOSITION | EP2671860 |
| OPPOSITION | JPH04110388 |
| OPPOSITION | US2005199376 |
| OPPOSITION | US2006106263 |
| OPPOSITION | US2006185972 |
| OPPOSITION | US2006243944 |
| OPPOSITION | US2007100175 |
| OPPOSITION | US2007245759 |
| OPPOSITION | US2007258909 |
| OPPOSITION | US2008058562 |
| OPPOSITION | US3884828 |
| OPPOSITION | US5006568 |
| OPPOSITION | US6244055 |
| OPPOSITION | WO2005105947 |
| OPPOSITION | WO2007079431 |
| OPPOSITION | WO2008002499 |
| OPPOSITION | WO2008002500 |
| OPPOSITION | WO2008030439 |
| OPPOSITION | WO2008054780 |
| OPPOSITION | WO2008054781 |
| OPPOSITION | WO2008054782 |
| OPPOSITION | WO2009125201 |
| OPPOSITION | WO2009137656 |
| OPPOSITION | WO2009137658 |
| OPPOSITION | WO2010056695 |
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
Oct 11, 2024
Refund of fees
Appeal
Oct 8, 2024
Oct 8, 2024
Oct 8, 2024
Oct 4, 2024
Oct 4, 2024
Oct 4, 2024
Oct 4, 2024
Oct 4, 2024
Oct 2, 2024
(Electronic) Receipt
Appeal
Oct 2, 2024
Oct 2, 2024
Oct 2, 2024
Withdrawal of an appeal
Appeal
Sep 20, 2024
Sep 20, 2024
Sep 20, 2024
Sep 20, 2024
Sep 20, 2024
Sep 17, 2024
(Electronic) Receipt
Appeal
Sep 17, 2024
Sep 17, 2024
Sep 16, 2024
Sep 16, 2024
Sep 13, 2024
(Electronic) Receipt
Appeal
Sep 13, 2024
Sep 13, 2024
Sep 11, 2024
Sep 11, 2024
Sep 10, 2024
(Electronic) Receipt
Appeal
Sep 10, 2024
Sep 10, 2024
Mar 22, 2024
Mar 22, 2024
Mar 22, 2024
Jan 23, 2024
Letter accompanying subsequently filed items
Search/Exam
Jan 10, 2024
Letter accompanying subsequently filed items
Search/Exam
Nov 7, 2023
Nov 7, 2023
Nov 7, 2023
Nov 2, 2023
Oct 30, 2023
Sep 20, 2023
Sep 20, 2023
Sep 20, 2023
Sep 20, 2023
Sep 12, 2023
(Electronic) Receipt
Appeal
Sep 12, 2023
Sep 12, 2023
Jul 24, 2023
Dec 20, 2022
Oct 14, 2022
Oct 14, 2022
Oct 14, 2022
Oct 14, 2022
Oct 14, 2022
Oct 11, 2022
(Electronic) Receipt
Appeal
Oct 11, 2022
Oct 11, 2022
Aug 29, 2022
Aug 29, 2022
Aug 29, 2022
Aug 29, 2022
Aug 25, 2022
Aug 25, 2022
Aug 25, 2022
Aug 25, 2022
Aug 24, 2022
(Electronic) Receipt
Appeal
Aug 24, 2022
Aug 24, 2022
Reply to appeal
Appeal
Aug 21, 2022
(Electronic) Receipt
Appeal
Aug 21, 2022
Aug 21, 2022
Reply to appeal
Appeal
Aug 17, 2022
Aug 17, 2022
Aug 17, 2022
Aug 17, 2022
Aug 11, 2022
(Electronic) Receipt
Appeal
Aug 11, 2022
Aug 11, 2022
Reply to appeal
Appeal
Aug 2, 2022
Aug 2, 2022
Aug 2, 2022
Aug 2, 2022
Jul 28, 2022
(Electronic) Receipt
Appeal
Jul 28, 2022
Jul 28, 2022
Jul 28, 2022
Reply to appeal
Appeal
Apr 14, 2022
Apr 8, 2022
(Electronic) Receipt
Appeal
Apr 8, 2022
Apr 8, 2022
Apr 8, 2022
Apr 8, 2022
Apr 8, 2022
Apr 8, 2022
Apr 8, 2022
Apr 8, 2022
Apr 8, 2022
Apr 8, 2022
Apr 8, 2022
Apr 8, 2022
Apr 8, 2022
Apr 8, 2022
Apr 8, 2022
Apr 8, 2022
Apr 8, 2022
Apr 8, 2022
Apr 8, 2022
Apr 8, 2022
Apr 8, 2022
Apr 8, 2022
Apr 8, 2022
Apr 8, 2022
Apr 8, 2022
Apr 8, 2022
Apr 8, 2022
Apr 8, 2022
Apr 8, 2022
Apr 8, 2022
Apr 8, 2022
Apr 8, 2022
Feb 8, 2022
Feb 8, 2022
Feb 8, 2022
Feb 8, 2022
Feb 2, 2022
(Electronic) Receipt
Appeal
Feb 2, 2022
Feb 2, 2022
Feb 1, 2022
Feb 1, 2022
Feb 1, 2022
Feb 1, 2022
Feb 1, 2022
Jan 25, 2022
(Electronic) Receipt
Appeal
Jan 25, 2022
Jan 25, 2022
Notice of appeal
Appeal
Jan 13, 2022
Jan 13, 2022
Jan 13, 2022
Dec 8, 2021
Dec 6, 2021
Dec 3, 2021
Dec 2, 2021
Dec 2, 2021
Dec 2, 2021
Dec 2, 2021
Dec 2, 2021
Dec 2, 2021
Dec 2, 2021
Dec 2, 2021
Dec 2, 2021
Means of redress
OPPO
Dec 2, 2021
Dec 2, 2021
Dec 2, 2021
Dec 2, 2021
Dec 2, 2021
Dec 2, 2021
Dec 2, 2021
Dec 2, 2021
Dec 2, 2021
Dec 2, 2021
Dec 2, 2021
Dec 2, 2021
Dec 2, 2021
Dec 2, 2021
Sep 8, 2021
Jul 14, 2021
Jul 14, 2021
Jul 14, 2021
Jul 14, 2021
Jul 14, 2021
Jul 8, 2021
Jul 8, 2021
Jul 8, 2021
Jul 8, 2021
Jul 8, 2021
Jul 8, 2021
Jul 8, 2021
Jul 8, 2021
Jul 8, 2021
Jul 8, 2021
Jul 8, 2021
Jul 8, 2021
Jul 8, 2021
Jul 8, 2021
Jul 8, 2021
Jul 6, 2021
Jul 4, 2021
Jul 4, 2021
Jul 4, 2021
Jun 11, 2021
Jun 11, 2021
Jun 11, 2021
Jun 11, 2021
Jun 11, 2021
Jun 8, 2021
Jun 8, 2021
Mar 26, 2021
Mar 26, 2021
Mar 26, 2021
Mar 26, 2021
Mar 26, 2021
Mar 26, 2021
Mar 12, 2021
Mar 4, 2021
Mar 4, 2021
Mar 3, 2021
Mar 2, 2021
Mar 2, 2021
Mar 2, 2021
Mar 2, 2021
Feb 26, 2021
Feb 26, 2021
Feb 26, 2021
Feb 26, 2021
Feb 26, 2021
Feb 26, 2021
Feb 26, 2021
Sep 11, 2020
Sep 11, 2020
Sep 11, 2020
Sep 11, 2020
Sep 11, 2020
Sep 9, 2020
Sep 9, 2020
Sep 9, 2020
Sep 9, 2020
Sep 9, 2020
Sep 2, 2020
Sep 2, 2020
Sep 2, 2020
Sep 2, 2020
Sep 2, 2020
Sep 2, 2020
Sep 2, 2020
Aug 31, 2020
Aug 31, 2020
Aug 31, 2020
Aug 31, 2020
Aug 31, 2020
Aug 31, 2020
Aug 31, 2020
Aug 31, 2020
Aug 31, 2020
Aug 31, 2020
Aug 31, 2020
Aug 31, 2020
Aug 31, 2020
Aug 28, 2020
Aug 28, 2020
Aug 28, 2020
Aug 28, 2020
Aug 12, 2020
Aug 12, 2020
Aug 12, 2020
Jul 23, 2020
Jul 23, 2020
Jul 23, 2020
Jul 23, 2020
Jul 23, 2020
Apr 22, 2020
Apr 22, 2020
Apr 22, 2020
Apr 22, 2020
Apr 22, 2020
Apr 15, 2020
Apr 15, 2020
Apr 15, 2020
Apr 15, 2020
Apr 8, 2020
Apr 8, 2020
Apr 8, 2020
Apr 8, 2020
Apr 8, 2020
Apr 8, 2020
Apr 8, 2020
Apr 8, 2020
Apr 2, 2020
Apr 2, 2020
Apr 2, 2020
Mar 20, 2020
Mar 20, 2020
Mar 20, 2020
Mar 20, 2020
Mar 20, 2020
Mar 10, 2020
Feb 19, 2020
Feb 17, 2020
Feb 14, 2020
Feb 14, 2020
Feb 11, 2020
Feb 11, 2020
Feb 11, 2020
Feb 11, 2020
Feb 11, 2020
Feb 11, 2020
Feb 11, 2020
Feb 11, 2020
Feb 11, 2020
Feb 11, 2020
Feb 11, 2020
Feb 11, 2020
Feb 11, 2020
May 29, 2019
May 29, 2019
May 29, 2019
May 29, 2019
May 21, 2019
May 21, 2019
May 21, 2019
May 21, 2019
May 21, 2019
May 21, 2019
May 21, 2019
May 21, 2019
May 21, 2019
May 21, 2019
May 21, 2019
May 21, 2019
May 21, 2019
May 21, 2019
May 21, 2019
May 21, 2019
May 21, 2019
May 21, 2019
May 21, 2019
May 21, 2019
May 21, 2019
May 21, 2019
May 21, 2019
May 21, 2019
May 21, 2019
May 21, 2019
May 21, 2019
May 21, 2019
May 21, 2019
May 21, 2019
May 21, 2019
May 6, 2019
May 6, 2019
May 6, 2019
May 6, 2019
Apr 25, 2019
Apr 25, 2019
Apr 25, 2019
Apr 25, 2019
Apr 25, 2019
Apr 23, 2019
Apr 23, 2019
Apr 23, 2019
Apr 17, 2019
Jan 15, 2019
Dec 14, 2018
Dec 11, 2018
Dec 11, 2018
Dec 11, 2018
Dec 11, 2018
Dec 11, 2018
Nov 27, 2018
Nov 26, 2018
Nov 23, 2018
Nov 22, 2018
Nov 21, 2018
Nov 21, 2018
Nov 21, 2018
Nov 21, 2018
Nov 21, 2018
Nov 21, 2018
Nov 21, 2018
Nov 21, 2018
Nov 20, 2018
Nov 20, 2018
Nov 20, 2018
Nov 20, 2018
Nov 20, 2018
Nov 20, 2018
Nov 20, 2018
Nov 19, 2018
Nov 19, 2018
Nov 19, 2018
Nov 19, 2018
Nov 19, 2018
Nov 19, 2018
Nov 19, 2018
Nov 19, 2018
Nov 19, 2018
Nov 19, 2018
Nov 19, 2018
Nov 19, 2018
Nov 19, 2018
Nov 19, 2018
Nov 19, 2018
Nov 16, 2018
Nov 16, 2018
Nov 16, 2018
Nov 16, 2018
Nov 16, 2018
Nov 16, 2018
Nov 16, 2018
Nov 16, 2018
Nov 16, 2018
Nov 16, 2018
Nov 16, 2018
Nov 16, 2018
Nov 16, 2018
Nov 16, 2018
Nov 16, 2018
Nov 16, 2018
Nov 16, 2018
Nov 16, 2018
Nov 16, 2018
Nov 16, 2018
Nov 16, 2018
Nov 16, 2018
Nov 16, 2018
Nov 16, 2018
Nov 16, 2018
Nov 16, 2018
Mar 9, 2018
Jan 25, 2018
Decision to grant a European patent
Search/Exam
Jan 9, 2018
Filing of the translations of the claims
Search/Exam
Sep 6, 2017
Sep 6, 2017
Sep 6, 2017
Intention to grant (signatures)
Search/Exam
Sep 6, 2017
Text intended for grant (clean copy)
Search/Exam
Sep 6, 2017
Aug 22, 2017
Aug 21, 2017
Jul 27, 2017
Amended claims with annotations
Search/Exam
Jul 27, 2017
Amended description with annotations
Search/Exam
Jul 27, 2017
Claims
Search/Exam
Jul 27, 2017
Description
Search/Exam
Jul 27, 2017
French translation of claims
Search/Exam
Jul 27, 2017
German translation of the claims
Search/Exam
Jul 27, 2017
Payment of fees and costs
Search/Exam
Jul 27, 2017
Mar 23, 2017
Mar 23, 2017
Mar 23, 2017
Intention to grant (signatures)
Search/Exam
Mar 23, 2017
Text intended for grant (clean copy)
Search/Exam
Mar 23, 2017
May 24, 2016
May 11, 2016
Payment of fees and costs
Search/Exam
May 11, 2016
Mar 10, 2016
Mar 10, 2016
Mar 2, 2016
(Electronic) Receipt
Search/Exam
Mar 2, 2016
Letter accompanying subsequently filed items
Search/Exam
Mar 2, 2016
Feb 12, 2016
(Electronic) Receipt
Search/Exam
Feb 12, 2016
Amended description with annotations
Search/Exam
Feb 12, 2016
Claims
Search/Exam
Feb 12, 2016
Description
Search/Exam
Feb 12, 2016
Letter accompanying subsequently filed items
Search/Exam
Feb 12, 2016
Feb 1, 2016
Annex to the communication
Search/Exam
Feb 1, 2016
Communication from the Examining Division
Search/Exam
Apr 10, 2015
CDS Clean up - amended applicant details
Search/Exam
Apr 7, 2015
Mar 18, 2015
Mar 12, 2015
Sep 11, 2013
Claims
Search/Exam
Sep 11, 2013
May 3, 2013
Annex to the communication
Search/Exam
May 3, 2013
Communication from the Examining Division
Search/Exam
Dec 6, 2011
Claims
Search/Exam
Dec 6, 2011
Dec 5, 2011
Oct 7, 2011
Oct 4, 2011
Oct 3, 2011
May 24, 2011
Annex to the communication
Search/Exam
May 24, 2011
Communication from the Examining Division
Search/Exam
Dec 15, 2010
Dec 15, 2010
Nov 29, 2010
Nov 11, 2010
Nov 11, 2010
Amendments received before examination
Search/Exam
Oct 29, 2010
Notice on debiting of fees
Search/Exam
Oct 14, 2010
(Electronic) Receipt
Search/Exam
Oct 14, 2010
Request for entry into the European phase
Search/Exam
Sep 17, 2010
Information on entry into European phase
Search/Exam
Dec 30, 2009
Copy of the international search report
Search/Exam
Dec 30, 2009
Dec 3, 2009
Nov 12, 2009
Published international application - A2
Search/Exam
Nov 9, 2009
Nov 9, 2009
Nov 9, 2009
May 22, 2009
Abstract
PCTISA
May 22, 2009
Claims
PCTISA
May 22, 2009
Description
PCTISA
May 22, 2009
Drawings
PCTISA
May 22, 2009