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The patent EP2683776 was granted to Tronox on Oct 4, 2017. The application was filed on Jan 10, 2012 under application number EP12754405A. 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 |
|---|---|---|---|
| KRONOS | Jul 4, 2018 | HOFFMANN EITLE | - |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | US2007295244 |
| INTERNATIONAL-SEARCH-REPORT | US2008271642 |
| INTERNATIONAL-SEARCH-REPORT | US2010125117 |
| INTERNATIONAL-SEARCH-REPORT | US2011041726 |
| INTERNATIONAL-SEARCH-REPORT | US3649322 |
| INTERNATIONAL-SEARCH-REPORT | US3928057 |
| INTERNATIONAL-SEARCH-REPORT | US4017328 |
| INTERNATIONAL-SEARCH-REPORT | US4075031 |
| INTERNATIONAL-SEARCH-REPORT | US4199370 |
| INTERNATIONAL-SEARCH-REPORT | US4416699 |
| INTERNATIONAL-SEARCH-REPORT | US6395081 |
| OPPOSITION | EP0576120 |
| OPPOSITION | EP1541638 |
| OPPOSITION | GB969352 |
| OPPOSITION | US2006000390 |
| OPPOSITION | US2007295244 |
| OPPOSITION | US3928057 |
| OPPOSITION | US4075031 |
| OPPOSITION | US5554216 |
| OPPOSITION | WO0179358 |
| SEARCH | US2007295244 |
| SEARCH | US3928057 |
| SEARCH | US4075031 |
| SEARCH | US5554216 |
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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Jul 20, 2022
Refund of fees
Appeal
Jul 20, 2022
Jul 19, 2022
Jul 19, 2022
Jul 19, 2022
Jul 12, 2022
Jul 12, 2022
Jul 7, 2022
Jul 4, 2022
Jun 28, 2022
(Electronic) Receipt
Appeal
Jun 28, 2022
Jun 28, 2022
Feb 24, 2022
Feb 24, 2022
Feb 14, 2022
Feb 14, 2022
Feb 9, 2022
Dec 9, 2021
Sep 20, 2021
Aug 31, 2020
Aug 25, 2020
(Electronic) Receipt
Appeal
Aug 25, 2020
Aug 25, 2020
Aug 25, 2020
Aug 25, 2020
Aug 25, 2020
Aug 25, 2020
Aug 25, 2020
Aug 25, 2020
Aug 25, 2020
Aug 25, 2020
Aug 25, 2020
Reply to appeal
Appeal
Apr 20, 2020
Apr 15, 2020
(Electronic) Receipt
Appeal
Apr 15, 2020
Apr 15, 2020
Apr 15, 2020
Feb 10, 2020
Feb 10, 2020
Feb 4, 2020
(Electronic) Receipt
Appeal
Feb 4, 2020
Feb 4, 2020
Notice of appeal
Appeal
Jan 2, 2020
Jan 2, 2020
Jan 2, 2020
Jan 2, 2020
Dec 18, 2019
Dec 16, 2019
Dec 16, 2019
Dec 16, 2019
Dec 16, 2019
Dec 16, 2019
Dec 16, 2019
Dec 16, 2019
Dec 16, 2019
Dec 16, 2019
Means of redress
OPPO
Dec 16, 2019
Dec 16, 2019
Dec 16, 2019
Dec 16, 2019
Dec 16, 2019
Dec 16, 2019
Nov 18, 2019
Nov 15, 2019
Nov 12, 2019
Nov 11, 2019
Nov 11, 2019
Nov 11, 2019
Nov 11, 2019
Nov 11, 2019
Sep 24, 2019
Sep 24, 2019
Sep 18, 2019
Sep 18, 2019
Sep 18, 2019
Sep 18, 2019
Sep 18, 2019
Claims
OPPO
Sep 18, 2019
Sep 18, 2019
Sep 16, 2019
Sep 16, 2019
Sep 16, 2019
Apr 29, 2019
Apr 29, 2019
Apr 29, 2019
Apr 24, 2019
Apr 1, 2019
Mar 28, 2019
Mar 28, 2019
Mar 28, 2019
Mar 28, 2019
Mar 28, 2019
Mar 28, 2019
Dec 12, 2018
Dec 3, 2018
Dec 3, 2018
Dec 3, 2018
Dec 3, 2018
Dec 3, 2018
Claims
OPPO
Dec 3, 2018
Claims
OPPO
Dec 3, 2018
Claims
OPPO
Dec 3, 2018
Dec 3, 2018
Jul 24, 2018
Jul 24, 2018
Jul 11, 2018
Jul 3, 2018
Jul 3, 2018
Jul 3, 2018
Jul 3, 2018
Jul 3, 2018
Jul 3, 2018
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Jul 3, 2018
Jul 3, 2018
Jul 3, 2018
Jul 3, 2018
Jul 3, 2018
Jul 3, 2018
Jul 3, 2018
Jul 3, 2018
Oct 12, 2017
Sep 7, 2017
Decision to grant a European patent
Search/Exam
Aug 22, 2017
(Electronic) Receipt
Search/Exam
Aug 22, 2017
Filing of the translations of the claims
Search/Exam
Aug 22, 2017
French translation of claims
Search/Exam
Aug 22, 2017
German translation of the claims
Search/Exam
Aug 22, 2017
Letter accompanying subsequently filed items
Search/Exam
Jun 12, 2017
Jun 7, 2017
Jun 6, 2017
Apr 26, 2017
Apr 26, 2017
Apr 26, 2017
Intention to grant (signatures)
Search/Exam
Apr 26, 2017
Text intended for grant (clean copy)
Search/Exam
Apr 26, 2017
Mar 16, 2017
(Electronic) Receipt
Search/Exam
Mar 16, 2017
Amended description with annotations
Search/Exam
Mar 16, 2017
Description
Search/Exam
Mar 16, 2017
Letter accompanying subsequently filed items
Search/Exam
Mar 16, 2017
Jan 16, 2017
Annex to the communication
Search/Exam
Jan 16, 2017
Communication from the Examining Division
Search/Exam
Jan 9, 2017
Examination started
Search/Exam
Sep 26, 2016
Sep 2, 2015
Aug 28, 2015
Letter accompanying subsequently filed items
Search/Exam
Aug 28, 2015
Feb 26, 2015
(Electronic) Receipt
Search/Exam
Feb 26, 2015
Feb 26, 2015
Amended claims with annotations
Search/Exam
Feb 26, 2015
Feb 26, 2015
Amended description with annotations
Search/Exam
Feb 26, 2015
Amendments received before examination
Search/Exam
Feb 26, 2015
Letter accompanying subsequently filed items
Search/Exam
Sep 9, 2014
Aug 21, 2014
Aug 21, 2014
European search opinion
Search/Exam
Aug 21, 2014
Supplementary European search report
Search/Exam
Aug 13, 2014
Search started
Search/Exam
May 22, 2014
(Electronic) Receipt
Search/Exam
May 22, 2014
May 22, 2014
Amended claims with annotations
Search/Exam
May 22, 2014
May 22, 2014
Amended description with annotations
Search/Exam
May 22, 2014
Amendments received before examination
Search/Exam
May 22, 2014
Letter accompanying subsequently filed items
Search/Exam
Dec 18, 2013
Nov 15, 2013
Oct 14, 2013
Communication to designated inventor
Search/Exam
Oct 14, 2013
Communication to designated inventor
Search/Exam
Sep 24, 2013
Sep 11, 2013
(Electronic) Receipt
Search/Exam
Sep 11, 2013
Sep 11, 2013
Matter concerning the application
Search/Exam
Sep 11, 2013
Request for entry into the European phase
Search/Exam
Jul 17, 2013
Information on entry into European phase
Search/Exam
Oct 3, 2012
Sep 13, 2012
Copy of the international search report
Search/Exam
Sep 13, 2012
Published international application - A1
Search/Exam