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The patent EP2554339 was granted to Panasonic on Sep 21, 2022. The application was filed on Mar 24, 2011 under application number EP11759499A. 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 |
|---|---|---|---|
| THE PROCTER & GAMBLE | Feb 7, 2020 | ELKINGTON AND FIFE | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | JP3083548B |
| INTERNATIONAL-SEARCH-REPORT | JPS5739871 |
| INTERNATIONAL-SEARCH-REPORT | JPS5837871U |
| INTERNATIONAL-SEARCH-REPORT | JPS5858469U |
| INTERNATIONAL-SEARCH-REPORT | JPS6044765U |
| OPPOSITION | EP1930137 |
| OPPOSITION | EP2347869 |
| OPPOSITION | JPS5739871 |
| OPPOSITION | US2009271994 |
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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Refund of fees
Appeal
May 10, 2022
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(Electronic) Receipt
Appeal
May 4, 2022
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Withdrawal of an appeal
Appeal
May 2, 2022
May 2, 2022
Apr 29, 2022
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Mar 16, 2022
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Mar 9, 2022
(Electronic) Receipt
Appeal
Mar 9, 2022
Mar 9, 2022
Notice of appeal
Appeal
Mar 4, 2022
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Description
OPPO
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May 20, 2019
Apr 11, 2019
Decision to grant a European patent
Search/Exam
Mar 8, 2019
(Electronic) Receipt
Search/Exam
Mar 8, 2019
French translation of claims
Search/Exam
Mar 8, 2019
German translation of the claims
Search/Exam
Mar 8, 2019
Letter accompanying subsequently filed items
Search/Exam
Nov 12, 2018
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Intention to grant (signatures)
Search/Exam
Nov 12, 2018
Text intended for grant (clean copy)
Search/Exam
Nov 12, 2018
Oct 24, 2018
Examination started
Search/Exam
Jan 29, 2018
Jan 16, 2018
(Electronic) Receipt
Search/Exam
Jan 16, 2018
Enquiry as to the processing of the file
Search/Exam
Jan 16, 2018
Letter accompanying subsequently filed items
Search/Exam
May 11, 2017
Submission concerning representation
Search/Exam
Jul 21, 2014
Submission concerning representation
Search/Exam
Apr 30, 2014
Apr 30, 2014
Amended claims with annotations
Search/Exam
Apr 30, 2014
Apr 30, 2014
Amendments received before examination
Search/Exam
Nov 12, 2013
Oct 25, 2013
Oct 25, 2013
European search opinion
Search/Exam
Oct 25, 2013
Supplementary European search report
Search/Exam
Oct 18, 2013
Search started
Search/Exam
Jan 9, 2013
Notification of forthcoming publication
Search/Exam
Nov 23, 2012
Nov 6, 2012
Oct 31, 2012
Communication to designated inventor
Search/Exam
Oct 31, 2012
Communication to designated inventor
Search/Exam
Oct 31, 2012
Communication to designated inventor
Search/Exam
Oct 31, 2012
Communication to designated inventor
Search/Exam
Oct 31, 2012
Communication to designated inventor
Search/Exam
Oct 15, 2012
Aug 14, 2012
(Electronic) Receipt
Search/Exam
Aug 14, 2012
Abstract
Search/Exam
Aug 14, 2012
Claims
Search/Exam
Aug 14, 2012
Description
Search/Exam
Aug 14, 2012
Drawings
Search/Exam
Aug 14, 2012
Request for entry into the European phase
Search/Exam
Aug 3, 2012
Information on entry into European phase
Search/Exam
Jan 24, 2012
Notification of the recording of a change
Search/Exam
Oct 17, 2011
Sep 29, 2011
Copy of the international search report
Search/Exam
Sep 29, 2011
Sep 29, 2011
International publication pamphlet
Search/Exam