The weekly litigation news digest is live. Subscribe now
The patent EP2531533 was granted to Totalenergies Onetech Belgium on Mar 26, 2025. The application was filed on Feb 3, 2011 under application number EP11702193A. 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 |
|---|---|---|---|
| CHEVRON PHILLIPS CHEMICAL LP | May 19, 2022 | ABEL & IMRAY | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US6864207 |
| DESCRIPTION | US6930071 |
| EXAMINATION | US2004116625 |
| EXAMINATION | WO2006026493 |
| EXAMINATION | WO2011000925 |
| INTERNATIONAL-SEARCH-REPORT | EP1316566 |
| INTERNATIONAL-SEARCH-REPORT | EP1526143 |
| INTERNATIONAL-SEARCH-REPORT | US2005272891 |
| OPPOSITION | US2004116625 |
| OPPOSITION | US2005272891 |
| OPPOSITION | US6034186 |
| OPPOSITION | US6545106 |
| OPPOSITION | WO2005082962 |
| OPPOSITION | WO2006026493 |
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
Feb 27, 2025
Feb 27, 2025
Jun 13, 2024
Jun 13, 2024
Jun 13, 2024
Jun 13, 2024
Jun 13, 2024
Jun 3, 2024
Jun 3, 2024
Jun 3, 2024
May 28, 2024
Feb 26, 2024
Feb 26, 2024
Feb 26, 2024
Feb 26, 2024
Feb 26, 2024
Feb 26, 2024
Feb 26, 2024
Feb 26, 2024
Feb 26, 2024
Means of redress
OPPO
Feb 26, 2024
Feb 26, 2024
Feb 26, 2024
Feb 26, 2024
Feb 26, 2024
Feb 26, 2024
Jan 30, 2024
Dec 7, 2023
Dec 6, 2023
Dec 5, 2023
Dec 1, 2023
Dec 1, 2023
Dec 1, 2023
Nov 30, 2023
Nov 30, 2023
Nov 30, 2023
Nov 30, 2023
Nov 30, 2023
Nov 30, 2023
Jan 30, 2023
Jan 25, 2023
Jan 25, 2023
Jan 25, 2023
Jan 25, 2023
Jan 25, 2023
Jan 25, 2023
Jan 25, 2023
Jan 25, 2023
Oct 24, 2022
Oct 24, 2022
Oct 24, 2022
Oct 17, 2022
Oct 12, 2022
Oct 12, 2022
Oct 12, 2022
Oct 12, 2022
Oct 12, 2022
Oct 12, 2022
Oct 12, 2022
Oct 12, 2022
Oct 12, 2022
Oct 12, 2022
Oct 12, 2022
Oct 12, 2022
Oct 12, 2022
Oct 12, 2022
Oct 12, 2022
Oct 12, 2022
Oct 6, 2022
Oct 6, 2022
Oct 6, 2022
Oct 3, 2022
Oct 3, 2022
Oct 3, 2022
Oct 3, 2022
Oct 3, 2022
Oct 3, 2022
Oct 3, 2022
Jun 13, 2022
Jun 13, 2022
May 25, 2022
May 19, 2022
May 19, 2022
May 19, 2022
May 19, 2022
May 19, 2022
May 19, 2022
May 19, 2022
May 19, 2022
May 19, 2022
May 19, 2022
Sep 7, 2021
Jul 29, 2021
Decision to grant a European patent
Search/Exam
Jul 16, 2021
(Electronic) Receipt
Search/Exam
Jul 16, 2021
Filing of the translations of the claims
Search/Exam
Jul 16, 2021
French translation of claims
Search/Exam
Jul 16, 2021
German translation of the claims
Search/Exam
Jul 16, 2021
Letter accompanying subsequently filed items
Search/Exam
Mar 30, 2021
Mar 30, 2021
Mar 30, 2021
Intention to grant (signatures)
Search/Exam
Mar 30, 2021
Text intended for grant (clean copy)
Search/Exam
Mar 30, 2021
Feb 26, 2021
(Electronic) Receipt
Search/Exam
Feb 26, 2021
Letter concerning fees and payments
Search/Exam
Aug 7, 2018
(Electronic) Receipt
Search/Exam
Aug 7, 2018
Letter accompanying subsequently filed items
Search/Exam
Aug 7, 2018
May 25, 2018
May 18, 2018
(Electronic) Receipt
Search/Exam
May 18, 2018
Letter accompanying subsequently filed items
Search/Exam
May 18, 2018
Jan 31, 2018
Annex to the communication
Search/Exam
Jan 31, 2018
Communication from the Examining Division
Search/Exam
Sep 22, 2017
(Electronic) Receipt
Search/Exam
Sep 22, 2017
Amended claims with annotations
Search/Exam
Sep 22, 2017
Claims
Search/Exam
Sep 22, 2017
Letter accompanying subsequently filed items
Search/Exam
Sep 22, 2017
May 15, 2017
Annex to the communication
Search/Exam
May 15, 2017
Communication from the Examining Division
Search/Exam
Jan 5, 2016
(Electronic) Receipt
Search/Exam
Jan 5, 2016
Amended claims with annotations
Search/Exam
Jan 5, 2016
Claims
Search/Exam
Jan 5, 2016
Letter accompanying subsequently filed items
Search/Exam
Jan 5, 2016
Dec 22, 2015
Dec 22, 2015
Dec 21, 2015
Dec 15, 2015
Dec 15, 2015
Sep 4, 2015
Aug 31, 2015
Annex to the communication
Search/Exam
Aug 31, 2015
Communication from the Examining Division
Search/Exam
Aug 21, 2015
Aug 21, 2015
Aug 19, 2015
Aug 20, 2014
(Electronic) Receipt
Search/Exam
Aug 20, 2014
Description
Search/Exam
Aug 20, 2014
Letter accompanying subsequently filed items
Search/Exam
Aug 20, 2014
Jul 2, 2014
Annex to the communication
Search/Exam
Jul 2, 2014
Communication from the Examining Division
Search/Exam
Feb 15, 2014
Feb 13, 2014
Feb 10, 2014
Jan 30, 2014
(Electronic) Receipt
Search/Exam
Jan 30, 2014
Amended claims with annotations
Search/Exam
Jan 30, 2014
Claims
Search/Exam
Jan 30, 2014
Letter accompanying subsequently filed items
Search/Exam
Jan 30, 2014
Dec 2, 2013
Nov 26, 2013
(Electronic) Receipt
Search/Exam
Nov 26, 2013
Letter accompanying subsequently filed items
Search/Exam
Nov 26, 2013
Jul 26, 2013
Annex to the communication
Search/Exam
Jul 26, 2013
Communication from the Examining Division
Search/Exam
Jul 12, 2013
Examination started
Search/Exam
Apr 2, 2013
(Electronic) Receipt
Search/Exam
Apr 2, 2013
Letter accompanying subsequently filed items
Search/Exam
Apr 2, 2013
Reply to Written Opinion prepared by the EPO
Search/Exam
Nov 14, 2012
Oct 15, 2012
Communication to designated inventor
Search/Exam
Oct 9, 2012
(Electronic) Receipt
Search/Exam
Oct 9, 2012
Letter accompanying subsequently filed items
Search/Exam
Oct 9, 2012
Letter concerning the inventor
Search/Exam
Oct 4, 2012
Oct 4, 2012
Sep 27, 2012
Letter which had not been notified
Search/Exam
Sep 26, 2012
Priority search results copy provided by EPO
Search/Exam
Sep 26, 2012
Priority search results copy provided by EPO
Search/Exam
Sep 14, 2012
Communication to designated inventor
Search/Exam
Sep 14, 2012
Communication to designated inventor
Search/Exam
Sep 14, 2012
Communication to designated inventor
Search/Exam
Sep 14, 2012
Communication to designated inventor
Search/Exam
Sep 14, 2012
Communication to designated inventor
Search/Exam
Sep 14, 2012
Communication to designated inventor
Search/Exam
Sep 14, 2012
Communication to designated inventor
Search/Exam
Sep 4, 2012
(Electronic) Receipt
Search/Exam
Sep 4, 2012
Request for entry into the European phase
Search/Exam
Aug 28, 2012
Aug 28, 2012
Notification of the recording of a change
Search/Exam
Aug 21, 2012
Jul 23, 2012
Jun 15, 2012
Information on entry into European phase
Search/Exam
Aug 29, 2011
Aug 29, 2011
Aug 11, 2011
Copy of the international search report
Search/Exam
Aug 11, 2011
Published international application - A1
Search/Exam
May 6, 2011
May 6, 2011
May 6, 2011
Apr 28, 2011
Apr 28, 2011
Apr 28, 2011
Apr 28, 2011
Feb 3, 2011
(Electronic) Receipt
PCTRO
Feb 3, 2011
Abstract
PCTRO
Feb 3, 2011
Claims
PCTRO
Feb 3, 2011
Description
PCTRO
Feb 3, 2011
Drawings
PCTRO
Feb 3, 2011
Feb 3, 2011