The patent EP2556521 was granted to ABB Power Grids Switzerland on May 30, 2018. The application was originally filed on Apr 4, 2011 under application number EP11713651A. The patent is currently recorded with a legal status of "Opposition Rejected".

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.
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | WO2008127575 |
| INTERNATIONAL-SEARCH-REPORT | EP2075806 |
| INTERNATIONAL-SEARCH-REPORT | GB900721 |
| INTERNATIONAL-SEARCH-REPORT | US2008211611 |
| INTERNATIONAL-SEARCH-REPORT | US5267393 |
| INTERNATIONAL-SEARCH-REPORT | WO0108175 |
| INTERNATIONAL-SEARCH-REPORT | WO2008127575 |
| INTERNATIONAL-SEARCH-REPORT | WO2009104197 |
| OPPOSITION | CN2293111Y |
| OPPOSITION | EP2075806 |
| OPPOSITION | GB709361 |
| OPPOSITION | GB743002 |
| OPPOSITION | KR100947261B |
| OPPOSITION | KR20010008307 |
| OPPOSITION | US2008211611 |
| OPPOSITION | US2010143639 |
| OPPOSITION | US2010328002 |
| OPPOSITION | US3164794 |
| OPPOSITION | US3167732 |
| OPPOSITION | WO0108175 |
| OPPOSITION | WO2007086650 |
NPL citations refer to non-patent references such as research papers, articles, or other publications cited during examination or opposition phases.
| Citation Phase | Reference Text |
|---|---|
| OPPOSITION | - "Geafol-Gießharztransformatoren", Siemens-Broschüre, (20090000), pages 1 - 6, XP055567827 |
Get a free citation report including examiner, opposition, and international search citations.
Get Citation ReportThe 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 1, 2021
Oct 1, 2021
Sep 28, 2021
Jun 23, 2021
Jun 18, 2021
Jun 17, 2021
Jun 17, 2021
Jun 17, 2021
Jun 17, 2021
Jun 17, 2021
Jun 17, 2021
Jun 17, 2021
Means of redress
OPPO
Jun 17, 2021
Jun 17, 2021
Jun 17, 2021
Jun 17, 2021
Jun 17, 2021
Jun 17, 2021
May 7, 2021
Mar 11, 2021
Mar 9, 2021
Mar 9, 2021
Mar 8, 2021
Mar 5, 2021
Mar 5, 2021
Mar 5, 2021
Mar 5, 2021
Mar 5, 2021
Mar 5, 2021
Mar 5, 2021
Mar 5, 2021
Mar 5, 2021
Mar 5, 2021
Mar 5, 2021
Mar 3, 2021
Mar 3, 2021
Authorisation
OPPO
Mar 3, 2021
Mar 3, 2021
Feb 3, 2021
Feb 3, 2021
Sep 25, 2020
Sep 22, 2020
Sep 17, 2020
Sep 17, 2020
Sep 17, 2020
Sep 17, 2020
Sep 17, 2020
Sep 17, 2020
Sep 4, 2020
Sep 1, 2020
Sep 1, 2020
Aug 25, 2020
Aug 25, 2020
Aug 25, 2020
Aug 20, 2020
Aug 20, 2020
Aug 20, 2020
Aug 17, 2020
Aug 14, 2020
Aug 12, 2020
Aug 12, 2020
Aug 10, 2020
Aug 10, 2020
Aug 10, 2020
Aug 10, 2020
Aug 10, 2020
Aug 10, 2020
Aug 10, 2020
Aug 10, 2020
Aug 10, 2020
Aug 10, 2020
Aug 7, 2020
Aug 7, 2020
Aug 7, 2020
Aug 7, 2020
Aug 7, 2020
Aug 7, 2020
Aug 7, 2020
Aug 7, 2020
Aug 7, 2020
Aug 7, 2020
Aug 4, 2020
Aug 4, 2020
Aug 4, 2020
Aug 4, 2020
Jul 29, 2020
Jul 29, 2020
Jul 29, 2020
Jul 15, 2020
Jul 14, 2020
Jul 14, 2020
Jul 14, 2020
Jul 7, 2020
Jul 7, 2020
Jul 7, 2020
Jun 12, 2020
Jun 12, 2020
Jun 4, 2020
Jun 4, 2020
Jun 4, 2020
Jun 4, 2020
Jun 4, 2020
Apr 8, 2020
Apr 8, 2020
Mar 31, 2020
Mar 31, 2020
Mar 31, 2020
Authorisation
OPPO
Mar 31, 2020
Mar 31, 2020
Feb 11, 2020
Feb 7, 2020
Feb 6, 2020
Feb 6, 2020
Feb 6, 2020
Feb 6, 2020
Feb 6, 2020
Feb 6, 2020
Aug 27, 2019
Aug 27, 2019
Aug 27, 2019
Aug 26, 2019
Aug 20, 2019
Aug 20, 2019
Authorisation
OPPO
Aug 20, 2019
Aug 20, 2019
Aug 20, 2019
Apr 11, 2019
Apr 4, 2019
Apr 4, 2019
Apr 4, 2019
Apr 4, 2019
Apr 4, 2019
Mar 5, 2019
Mar 5, 2019
Mar 5, 2019
Mar 5, 2019
Feb 28, 2019
Feb 27, 2019
Feb 27, 2019
Feb 27, 2019
Feb 27, 2019
Feb 27, 2019
Feb 27, 2019
Feb 27, 2019
Feb 27, 2019
Feb 27, 2019
Feb 27, 2019
Feb 27, 2019
Feb 27, 2019
Feb 27, 2019
Feb 27, 2019
Feb 27, 2019
Feb 27, 2019
Feb 27, 2019
Feb 27, 2019
Jun 11, 2018
Jun 5, 2018
May 30, 2018
May 4, 2018
Decision to grant a European patent
Search/Exam
Apr 23, 2018
(Electronic) Receipt
Search/Exam
Apr 23, 2018
Filing of the translations of the claims
Search/Exam
Apr 23, 2018
French translation of claims
Search/Exam
Apr 23, 2018
German translation of the claims
Search/Exam
Apr 23, 2018
Letter accompanying subsequently filed items
Search/Exam
Apr 20, 2018
Apr 4, 2018
(Electronic) Receipt
Search/Exam
Apr 4, 2018
Annexes in respect of a client data request
Search/Exam
Apr 4, 2018
Letter accompanying subsequently filed items
Search/Exam
Apr 4, 2018
Jan 3, 2018
Jan 3, 2018
Jan 3, 2018
Intention to grant (signatures)
Search/Exam
Jan 3, 2018
Text intended for grant (clean copy)
Search/Exam
Jan 3, 2018
Nov 30, 2017
Examination started
Search/Exam
Jul 14, 2017
Oct 26, 2016
Oct 26, 2016
Submission concerning representation
Search/Exam
May 9, 2013
(Electronic) Receipt
Search/Exam
May 9, 2013
May 9, 2013
May 9, 2013
Amendments received before examination
Search/Exam
May 9, 2013
Letter accompanying subsequently filed items
Search/Exam
Jan 16, 2013
Dec 5, 2012
Nov 12, 2012
Communication to designated inventor
Search/Exam
Nov 12, 2012
Communication to designated inventor
Search/Exam
Nov 12, 2012
Communication to designated inventor
Search/Exam
Oct 24, 2012
Oct 12, 2012
Notification of the recording of a change
Search/Exam
Oct 12, 2012
Notification of the recording of a change
Search/Exam
Oct 3, 2012
(Electronic) Receipt
Search/Exam
Oct 3, 2012
Request for entry into the European phase
Search/Exam
Aug 20, 2012
Information on entry into European phase
Search/Exam
Nov 1, 2011
Oct 13, 2011
Copy of the international search report
Search/Exam
Oct 13, 2011
Published international application - A1
Search/Exam
Aug 23, 2011
Aug 23, 2011
Aug 23, 2011
Apr 11, 2011
Abstract
PCTISA
Apr 11, 2011
Claims
PCTISA
Apr 11, 2011
Description
PCTISA
Apr 11, 2011
Drawings
PCTISA