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The patent EP2658510 was granted to KAO Germany on Apr 2, 2025. The application was originally filed on Dec 23, 2011 under application number EP11807932A. 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 | US2004221401 |
| INTERNATIONAL-SEARCH-REPORT | US2004253283 |
| INTERNATIONAL-SEARCH-REPORT | US2005011017 |
| INTERNATIONAL-SEARCH-REPORT | US2005129644 |
| INTERNATIONAL-SEARCH-REPORT | US5961667 |
| INTERNATIONAL-SEARCH-REPORT | WO2005065632 |
| OPPOSITION | DE19705875 |
| OPPOSITION | EP2055296 |
| OPPOSITION | FR2852834 |
| OPPOSITION | JP2002205924 |
| OPPOSITION | JPH08175940 |
| OPPOSITION | WO02089754 |
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.
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Description
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OPPO
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Appeal
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Appeal
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Appeal
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Appeal
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Appeal
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(Electronic) Receipt
Appeal
Apr 13, 2021
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Notice of appeal
Appeal
Feb 26, 2021
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Aug 6, 2018
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Decision to grant a European patent
Search/Exam
Jun 15, 2018
(Electronic) Receipt
Search/Exam
Jun 15, 2018
Filing of the translations of the claims
Search/Exam
Jun 15, 2018
French translation of claims
Search/Exam
Jun 15, 2018
German translation of the claims
Search/Exam
Mar 9, 2018
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Intention to grant (signatures)
Search/Exam
Mar 9, 2018
Text intended for grant (clean copy)
Search/Exam
Mar 9, 2018
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Claims
Search/Exam
Jan 22, 2018
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Claims
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Jan 18, 2018
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Advice of delivery
Search/Exam
Nov 13, 2017
Advice of delivery
Search/Exam
Nov 13, 2017
Advice of delivery
Search/Exam
Nov 10, 2017
Acknowledgement of a document
Search/Exam
Nov 10, 2017
Summons to attend oral proceedings
Search/Exam
Jul 17, 2017
Advice of delivery
Search/Exam
Jul 17, 2017
Advice of delivery
Search/Exam
Jul 14, 2017
Acknowledgement of a document
Search/Exam
Jul 14, 2017
Annex to the communication
Search/Exam
Jul 14, 2017
Preparation for oral proceedings
Search/Exam
Jul 14, 2017
Summons to attend oral proceedings
Search/Exam
Nov 8, 2016
Amended claims with annotations
Search/Exam
Nov 8, 2016
Claims
Search/Exam
Nov 8, 2016
Nov 4, 2016
Amended claims with annotations
Search/Exam
Nov 4, 2016
Claims
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Nov 4, 2016
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Annex to the communication
Search/Exam
Apr 25, 2016
Communication from the Examining Division
Search/Exam
Apr 19, 2016
Examination started
Search/Exam
Dec 30, 2014
Payment of fees and costs
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Dec 30, 2014
Payment of fees and costs
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Mar 22, 2014
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Amendments received before examination
Search/Exam
Mar 21, 2014
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Amendments received before examination
Search/Exam
Dec 13, 2013
(Electronic) Receipt
Search/Exam
Dec 13, 2013
Letter accompanying subsequently filed items
Search/Exam
Oct 9, 2013
Sep 11, 2013
Sep 4, 2013
Priority search results copy provided by EPO
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Aug 22, 2013
Letter which had not been notified
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Aug 2, 2013
Communication to designated inventor
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Aug 2, 2013
Communication to designated inventor
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Jul 17, 2013
Jul 11, 2013
(Electronic) Receipt
Search/Exam
Jul 11, 2013
Annexes in respect of a client data request
Search/Exam
Jul 11, 2013
Request for entry into the European phase
Search/Exam
May 13, 2013
Information on entry into European phase
Search/Exam
Jul 25, 2012
Jul 5, 2012
Copy of the international search report
Search/Exam
Jul 5, 2012
Published international application - A1
Search/Exam
Mar 7, 2012
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Dec 23, 2011
(Electronic) Receipt
PCTRO
Dec 23, 2011
Abstract
PCTRO
Dec 23, 2011
Claims
PCTRO
Dec 23, 2011
Description
PCTRO