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The patent EP2305849 was granted to Alcoa on Jan 26, 2022. The application was filed on Sep 27, 2004 under application number EP10183448A. 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 |
|---|---|---|---|
| C TEC CONSTELLIUM TECHNOLOGY CENTER CONSTELLIUM ISSOIRE | Oct 10, 2019 | CONSTELLIUM PROPRIETE INDUSTRIELLE | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| EXAMINATION | EP1673484 |
| EXAMINATION | US2004071586 |
| OPPOSITION | EP1170394 |
| OPPOSITION | US2004071586 |
| OPPOSITION | US5211910 |
| OPPOSITION | US5455003 |
| OPPOSITION | US6444058 |
| OPPOSITION | WO9405820 |
| OTHER | EP1170394 |
| OTHER | EP1673484 |
| OTHER | US5122339 |
| OTHER | US5455003 |
| OTHER | US5593516 |
| SEARCH | EP1170394 |
| SEARCH | GB869444 |
| SEARCH | JPS6425954 |
| SEARCH | WO9323584 |
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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Jan 7, 2022
Jan 7, 2022
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Dec 19, 2021
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Sep 28, 2021
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Sep 17, 2021
Refund of fees
Appeal
Sep 16, 2021
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Sep 9, 2021
(Electronic) Receipt
Appeal
Sep 9, 2021
Sep 9, 2021
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Withdrawal of an appeal
Appeal
Jul 23, 2021
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Jul 15, 2021
(Electronic) Receipt
Appeal
Jul 15, 2021
Jul 15, 2021
Notice of appeal
Appeal
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Jan 28, 2019
Dec 20, 2018
Decision to grant a European patent
Search/Exam
Nov 30, 2018
(Electronic) Receipt
Search/Exam
Nov 30, 2018
Filing of the translations of the claims
Search/Exam
Nov 30, 2018
French translation of claims
Search/Exam
Nov 30, 2018
German translation of the claims
Search/Exam
Nov 30, 2018
Letter accompanying subsequently filed items
Search/Exam
Sep 20, 2018
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Intention to grant (signatures)
Search/Exam
Sep 20, 2018
Text intended for grant (clean copy)
Search/Exam
Sep 20, 2018
Aug 21, 2018
(Electronic) Receipt
Search/Exam
Aug 21, 2018
Description
Search/Exam
Aug 21, 2018
Letter accompanying subsequently filed items
Search/Exam
Aug 21, 2018
Apr 11, 2018
Annex to the communication
Search/Exam
Apr 11, 2018
Communication from the Examining Division
Search/Exam
Feb 9, 2018
(Electronic) Receipt
Search/Exam
Feb 9, 2018
Claims
Search/Exam
Feb 9, 2018
Letter accompanying subsequently filed items
Search/Exam
Feb 9, 2018
Oct 2, 2017
Annex to the communication
Search/Exam
Oct 2, 2017
Communication from the Examining Division
Search/Exam
Mar 9, 2017
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Feb 27, 2017
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Annexes in respect of a client data request
Search/Exam
Feb 17, 2017
Feb 10, 2017
Annexes in respect of a client data request
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Feb 10, 2017
Sep 29, 2016
Submission concerning representation
Search/Exam
Apr 14, 2016
Claims
Search/Exam
Apr 14, 2016
Apr 11, 2016
Amended claims with annotations
Search/Exam
Apr 11, 2016
Jan 29, 2016
Jan 27, 2016
Jan 25, 2016
Sep 29, 2015
Annex to the communication
Search/Exam
Sep 29, 2015
Communication from the Examining Division
Search/Exam
Jul 8, 2014
Jul 7, 2014
Jul 3, 2014
Mar 19, 2014
CDS Clean up - amended applicant details
Search/Exam
Aug 26, 2013
Aug 26, 2013
Aug 16, 2013
Observations by third parties
Search/Exam
Jul 5, 2013
Decision to allow further processing
Search/Exam
Jun 21, 2013
Claims
Search/Exam
Jun 21, 2013
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Payment of fees and costs
Search/Exam
Jun 21, 2013
Request for further processing
Search/Exam
Jun 19, 2013
Claims
Search/Exam
Jun 19, 2013
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Payment of fees and costs
Search/Exam
Jun 19, 2013
Payment of fees and costs
Search/Exam
Jun 19, 2013
Request for further processing
Search/Exam
Apr 9, 2013
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Observations by third parties
Search/Exam
Jan 11, 2013
Patent document filed by a Third party
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Jan 11, 2013
Patent document filed by a Third party
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Jan 11, 2013
Patent document filed by a Third party
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Jan 11, 2013
Patent document filed by a Third party
Search/Exam
Dec 21, 2012
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Aug 23, 2012
Annex to the communication
Search/Exam
Aug 23, 2012
Communication from the Examining Division
Search/Exam
Mar 26, 2012
Mar 26, 2012
Amendments received before examination
Search/Exam
Mar 26, 2012
Payment of fees and costs
Search/Exam
Mar 21, 2012
Mar 21, 2012
Amendments received before examination
Search/Exam
Mar 21, 2012
Payment of fees and costs
Search/Exam
Sep 26, 2011
Sep 21, 2011
Refund of fees
Search/Exam
Aug 23, 2011
Aug 23, 2011
European search opinion
Search/Exam
Aug 23, 2011
European search report
Search/Exam
Mar 9, 2011
Notification of forthcoming publication
Search/Exam
Jan 18, 2011
Letter concerning fees and payments
Search/Exam
Oct 29, 2010
Sep 30, 2010
Abstract
Search/Exam
Sep 30, 2010
Sep 30, 2010
Claims
Search/Exam
Sep 30, 2010
Description
Search/Exam
Sep 30, 2010
Designation of inventor
Search/Exam
Sep 30, 2010
Designation of inventor
Search/Exam
Sep 30, 2010
Designation of inventor
Search/Exam
Sep 30, 2010
Drawings
Search/Exam
Sep 30, 2010
Request for grant of a European patent
Search/Exam
May 11, 2005