The patent EP1873208 was granted to Kaneka on Oct 9, 2024. The application was originally filed on Apr 12, 2006 under application number EP06731718A. 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.
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| EXAMINATION | CA2515825 |
| OPPOSITION | CA2515825 |
| OPPOSITION | EP0532049 |
| OPPOSITION | EP1471113 |
| OPPOSITION | JP2000119482 |
| OPPOSITION | JP2002020458 |
| OPPOSITION | US4345053 |
| SEARCH | EP0532049 |
| SEARCH | EP1471113 |
| SEARCH | JP2000119482 |
| SEARCH | JP2002020458 |
| SEARCH | US4345053 |
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Date
Description
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Oct 2, 2024
Oct 2, 2024
Sep 12, 2024
Sep 12, 2024
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Oct 25, 2023
Oct 20, 2023
(Electronic) Receipt
Appeal
Oct 20, 2023
Oct 20, 2023
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Oct 11, 2023
Oct 6, 2023
(Electronic) Receipt
Appeal
Oct 6, 2023
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Aug 11, 2023
Aug 11, 2023
Apr 26, 2023
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Apr 26, 2023
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(Electronic) Receipt
Appeal
Apr 21, 2023
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Sep 6, 2021
Sep 1, 2021
(Electronic) Receipt
Appeal
Sep 1, 2021
Sep 1, 2021
Sep 1, 2021
Sep 1, 2021
Sep 1, 2021
Sep 1, 2021
Sep 1, 2021
Reply to appeal
Appeal
May 28, 2021
May 3, 2021
Apr 26, 2021
(Electronic) Receipt
Appeal
Apr 26, 2021
Apr 26, 2021
Apr 26, 2021
Feb 3, 2021
Feb 3, 2021
Jan 21, 2021
(Electronic) Receipt
Appeal
Jan 21, 2021
Jan 21, 2021
Notice of appeal
Appeal
Jan 18, 2021
Jan 4, 2021
Dec 23, 2020
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Means of redress
OPPO
Dec 23, 2020
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Description
OPPO
Aug 4, 2020
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Claims
OPPO
Jan 29, 2019
Claims
OPPO
Jan 29, 2019
Claims
OPPO
Jan 29, 2019
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Sep 21, 2018
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Dec 14, 2017
Nov 9, 2017
Decision to grant a European patent
Search/Exam
Oct 25, 2017
(Electronic) Receipt
Search/Exam
Oct 25, 2017
Filing of the translations of the claims
Search/Exam
Oct 25, 2017
French translation of claims
Search/Exam
Oct 25, 2017
German translation of the claims
Search/Exam
Oct 25, 2017
Letter accompanying subsequently filed items
Search/Exam
Aug 11, 2017
Aug 11, 2017
Aug 11, 2017
Intention to grant (signatures)
Search/Exam
Aug 11, 2017
Text intended for grant (clean copy)
Search/Exam
Aug 11, 2017
Mar 30, 2017
(Electronic) Receipt
Search/Exam
Mar 30, 2017
Letter accompanying subsequently filed items
Search/Exam
Mar 30, 2017
Nov 25, 2016
Annex to the communication
Search/Exam
Nov 25, 2016
Communication from the Examining Division
Search/Exam
Jul 18, 2016
(Electronic) Receipt
Search/Exam
Jul 18, 2016
Amended claims with annotations
Search/Exam
Jul 18, 2016
Annex
Search/Exam
Jul 18, 2016
Claims
Search/Exam
Jul 18, 2016
Letter accompanying subsequently filed items
Search/Exam
Jul 18, 2016
Jun 14, 2016
Jun 9, 2016
(Electronic) Receipt
Search/Exam
Jun 9, 2016
Letter accompanying subsequently filed items
Search/Exam
Jun 9, 2016
Feb 1, 2016
Annex to the communication
Search/Exam
Feb 1, 2016
Communication from the Examining Division
Search/Exam
Jan 26, 2016
Examination started
Search/Exam
Mar 4, 2015
(Electronic) Receipt
Search/Exam
Mar 4, 2015
Mar 4, 2015
Amended claims with annotations
Search/Exam
Mar 4, 2015
Amendments received before examination
Search/Exam
Mar 4, 2015
Letter accompanying subsequently filed items
Search/Exam
Aug 26, 2014
Aug 8, 2014
Aug 8, 2014
European search opinion
Search/Exam
Aug 8, 2014
Supplementary European search report
Search/Exam
Jul 30, 2014
Search started
Search/Exam
Jun 27, 2013
Jan 30, 2013
Jan 30, 2013
Aug 25, 2008
Dec 5, 2007
Notification of forthcoming publication
Search/Exam
Nov 22, 2007
Oct 29, 2007
Oct 26, 2007
Abstract
Search/Exam
Oct 26, 2007
Oct 26, 2007
Claims
Search/Exam
Oct 26, 2007
Description
Search/Exam
Oct 26, 2007
Drawings
Search/Exam
Oct 26, 2007
Request for entry into the European phase
Search/Exam
Aug 31, 2007
Information on entry into European phase
Search/Exam
Nov 14, 2006
Oct 26, 2006
Copy of the international search report
Search/Exam
Oct 26, 2006
Oct 26, 2006
Published international application - A1
Search/Exam