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The patent EP2836602 was granted to Sweetwater Energy on Oct 3, 2018. The application was filed on Apr 12, 2013 under application number EP13775895A. The patent is currently recorded with a legal status of "Revoked".

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 |
|---|---|---|---|
| UPM KYMMENE OYJ | Jul 3, 2019 | HOFFMANN EITLE | - |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US2002038058 |
| DESCRIPTION | US2002192774 |
| DESCRIPTION | US2004152881 |
| DESCRIPTION | US2004168960 |
| DESCRIPTION | US2004171136 |
| DESCRIPTION | US2006024801 |
| DESCRIPTION | US2006069244 |
| DESCRIPTION | US2006188980 |
| DESCRIPTION | US2008121359 |
| DESCRIPTION | US2008176301 |
| DESCRIPTION | US2008227162 |
| DESCRIPTION | US2008280338 |
| DESCRIPTION | US2011275860 |
| DESCRIPTION | US2012037325 |
| DESCRIPTION | US4048341 |
| DESCRIPTION | US4182780 |
| DESCRIPTION | US4600590 |
| DESCRIPTION | US4644060 |
| DESCRIPTION | US5037663 |
| DESCRIPTION | US5171592 |
| DESCRIPTION | US5473061 |
| DESCRIPTION | US5693296 |
| DESCRIPTION | US5846787 |
| DESCRIPTION | US5865898 |
| DESCRIPTION | US5939544 |
| DESCRIPTION | US5969189 |
| DESCRIPTION | US5986133 |
| DESCRIPTION | US6043392 |
| DESCRIPTION | US6106888 |
| DESCRIPTION | US6176176 |
| DESCRIPTION | US6262313 |
| DESCRIPTION | US6416621 |
| DESCRIPTION | US6478965 |
| DESCRIPTION | WO2008020901 |
| INTERNATIONAL-SEARCH-REPORT | US2002038058 |
| INTERNATIONAL-SEARCH-REPORT | US2009298149 |
| INTERNATIONAL-SEARCH-REPORT | US2012037325 |
| INTERNATIONAL-SEARCH-REPORT | WO0132715 |
| INTERNATIONAL-SEARCH-REPORT | WO2009063138 |
| INTERNATIONAL-SEARCH-REPORT | WO2010056940 |
| OPPOSITION | US2009298149 |
| OPPOSITION | US7666637 |
| OPPOSITION | WO2009045651 |
| OPPOSITION | WO2009058276 |
| OPPOSITION | WO2010056940 |
| OPPOSITION | WO2010121348 |
| OPPOSITION | WO2011028554 |
| OPPOSITION | WO9640970 |
| SEARCH | WO2010011328 |
| SEARCH | WO2010123932 |
| SEARCH | WO2011028554 |
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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(Electronic) Receipt
Search/Exam
Apr 2, 2019
Letter accompanying subsequently filed items
Search/Exam
Apr 2, 2019
Oct 15, 2018
Sep 6, 2018
Decision to grant a European patent
Search/Exam
Aug 15, 2018
(Electronic) Receipt
Search/Exam
Aug 15, 2018
Filing of the translations of the claims
Search/Exam
Aug 15, 2018
French translation of claims
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Aug 15, 2018
German translation of the claims
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Aug 15, 2018
Letter accompanying subsequently filed items
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Apr 12, 2018
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Intention to grant (signatures)
Search/Exam
Apr 12, 2018
Text intended for grant (clean copy)
Search/Exam
Apr 12, 2018
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(Electronic) Receipt
Search/Exam
Feb 9, 2018
Amended description with annotations
Search/Exam
Feb 9, 2018
Description
Search/Exam
Feb 9, 2018
Letter accompanying subsequently filed items
Search/Exam
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(Electronic) Receipt
Search/Exam
Dec 11, 2017
Letter accompanying subsequently filed items
Search/Exam
Dec 11, 2017
Aug 4, 2017
Annex to the communication
Search/Exam
Aug 4, 2017
Communication from the Examining Division
Search/Exam
Jun 15, 2017
(Electronic) Receipt
Search/Exam
Jun 15, 2017
Letter accompanying subsequently filed items
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Annex to the communication
Search/Exam
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Examination started
Search/Exam
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(Electronic) Receipt
Search/Exam
Apr 22, 2016
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Amended claims with annotations
Search/Exam
Apr 22, 2016
Amendments received before examination
Search/Exam
Apr 22, 2016
Letter accompanying subsequently filed items
Search/Exam
Oct 15, 2015
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European search opinion
Search/Exam
Sep 28, 2015
Supplementary European search report
Search/Exam
Sep 11, 2015
Search started
Search/Exam
May 29, 2015
(Electronic) Receipt
Search/Exam
May 29, 2015
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Amendments received before examination
Search/Exam
May 29, 2015
Letter accompanying subsequently filed items
Search/Exam
Jan 21, 2015
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Communication to designated inventor
Search/Exam
Nov 18, 2014
Communication to designated inventor
Search/Exam
Oct 29, 2014
Oct 22, 2014
(Electronic) Receipt
Search/Exam
Oct 22, 2014
Matter concerning the application
Search/Exam
Oct 22, 2014
Request for entry into the European phase
Search/Exam
Aug 22, 2014
Information on entry into European phase
Search/Exam
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Copy of the international search report
Search/Exam
Oct 17, 2013
Published international application - A1
Search/Exam