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The patent EP2394957 was granted to Kentucky Tennessee Clay on Dec 27, 2023. The application was filed on Oct 26, 2009 under application number EP11177696A. 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 |
|---|---|---|---|
| SUMITOMO SHI FW ENERGIA | Sep 5, 2018 | GENIP | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| OPPOSITION | EP0338103 |
| OPPOSITION | US2006210463 |
| OPPOSITION | US3907674 |
| OPPOSITION | US4251265 |
| OPPOSITION | US4387653 |
| OPPOSITION | US4771712 |
| OPPOSITION | US5298473 |
| OPPOSITION | WO2008116117 |
| OPPOSITION | WO9911976 |
| SEARCH | US2006210463 |
| SEARCH | US4771712 |
| SEARCH | US5298473 |
| SEARCH | WO9911976 |
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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Nov 30, 2023
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Sep 12, 2023
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Sep 1, 2023
Jul 21, 2023
Advice of delivery
Appeal
Jul 12, 2023
Jul 12, 2023
Jul 12, 2023
May 23, 2023
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May 15, 2023
(Electronic) Receipt
Appeal
May 15, 2023
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Mar 16, 2023
(Electronic) Receipt
Appeal
Mar 16, 2023
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Jan 30, 2023
Jan 25, 2023
(Electronic) Receipt
Appeal
Jan 25, 2023
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Jan 20, 2023
Jan 17, 2023
(Electronic) Receipt
Appeal
Jan 17, 2023
Jan 17, 2023
Jan 2, 2023
Dec 21, 2022
(Electronic) Receipt
Appeal
Dec 21, 2022
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Sep 28, 2022
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(Electronic) Receipt
Appeal
Jun 14, 2022
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Apr 4, 2022
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Mar 30, 2022
Mar 29, 2022
(Electronic) Receipt
Appeal
Mar 29, 2022
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Mar 12, 2022
Feb 12, 2021
(Electronic) Receipt
Appeal
Feb 12, 2021
Nov 10, 2020
Nov 2, 2020
(Electronic) Receipt
Appeal
Nov 2, 2020
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Claims
Appeal
Nov 2, 2020
Nov 2, 2020
Reply to appeal
Appeal
Jun 22, 2020
Jun 12, 2020
(Electronic) Receipt
Appeal
Jun 12, 2020
Jun 12, 2020
Jun 12, 2020
Apr 17, 2020
Apr 8, 2020
(Electronic) Receipt
Appeal
Apr 8, 2020
Apr 8, 2020
Notice of appeal
Appeal
Mar 6, 2020
Mar 3, 2020
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Means of redress
OPPO
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Dec 14, 2017
Nov 9, 2017
Decision to grant a European patent
Search/Exam
Oct 26, 2017
(Electronic) Receipt
Search/Exam
Oct 26, 2017
Filing of the translations of the claims
Search/Exam
Oct 26, 2017
French translation of claims
Search/Exam
Oct 26, 2017
German translation of the claims
Search/Exam
Sep 4, 2017
Sep 4, 2017
Sep 4, 2017
Intention to grant (signatures)
Search/Exam
Sep 4, 2017
Text intended for grant (clean copy)
Search/Exam
Sep 4, 2017
Aug 12, 2016
(Electronic) Receipt
Search/Exam
Aug 12, 2016
Amended claims with annotations
Search/Exam
Aug 12, 2016
Claims
Search/Exam
Aug 12, 2016
Letter accompanying subsequently filed items
Search/Exam
Aug 12, 2016
Matter concerning the application
Search/Exam
Aug 12, 2016
Apr 5, 2016
Annex to the communication
Search/Exam
Apr 5, 2016
Communication from the Examining Division
Search/Exam
Mar 11, 2016
Examination started
Search/Exam
Aug 27, 2013
(Electronic) Receipt
Search/Exam
Aug 27, 2013
Letter accompanying subsequently filed items
Search/Exam
Aug 27, 2013
Reply to Written Opinion prepared by the EPO
Search/Exam
Mar 4, 2013
Jan 24, 2013
Jan 24, 2013
European search opinion
Search/Exam
Jan 24, 2013
European search report
Search/Exam
Dec 17, 2012
(Electronic) Receipt
Search/Exam
Dec 17, 2012
Dec 17, 2012
Letter accompanying subsequently filed items
Search/Exam
Dec 22, 2011
(Electronic) Receipt
Search/Exam
Dec 22, 2011
Designation of inventor
Search/Exam
Dec 22, 2011
Letter accompanying subsequently filed items
Search/Exam
Nov 16, 2011
Notification of forthcoming publication
Search/Exam
Oct 19, 2011
Deficiency in designation of inventor
Search/Exam
Aug 16, 2011
Abstract
Search/Exam
Aug 16, 2011
Aug 16, 2011
Claims
Search/Exam
Aug 16, 2011
Description
Search/Exam
Aug 16, 2011
Request for grant of a European patent
Search/Exam
May 28, 2010
May 28, 2010