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The patent EP3086899 was granted to Liburdi Engineering on May 31, 2023. The application was filed on Dec 24, 2013 under application number EP13900413A. 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 |
|---|---|---|---|
| SIEMENS ENERGY | Nov 16, 2020 | - | - |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US2868667 |
| DESCRIPTION | US2868 |
| DESCRIPTION | US3615376 |
| DESCRIPTION | US4169742 |
| DESCRIPTION | US5897801 |
| DESCRIPTION | US6659332 |
| DESCRIPTION | USRE29920E |
| INTERNATIONAL-SEARCH-REPORT | US5156321 |
| INTERNATIONAL-SEARCH-REPORT | US6659332 |
| INTERNATIONAL-SEARCH-REPORT | WO2014085892 |
| OPPOSITION | EP1835041 |
| OPPOSITION | EP1930455 |
| OPPOSITION | US2006216540 |
| OPPOSITION | US2012251840 |
| OPPOSITION | US3869284 |
| OPPOSITION | US5240491 |
| OPPOSITION | US5523170 |
| OPPOSITION | US5783318 |
| OPPOSITION | US6539620 |
| OPPOSITION | WO03025237 |
| SEARCH | US2006216540 |
| SEARCH | US2007272332 |
| SEARCH | US2012251840 |
| SEARCH | US5082625 |
| SEARCH | US5240491 |
| SEARCH | US5523170 |
| SEARCH | US5783318 |
| SEARCH | US6530971 |
| SEARCH | US8426033 |
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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May 8, 2023
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OPPO
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General enquiry
OPPO
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Apr 27, 2020
Mar 19, 2020
Decision to grant a European patent
Search/Exam
Mar 4, 2020
(Electronic) Receipt
Search/Exam
Mar 4, 2020
Filing of the translations of the claims
Search/Exam
Mar 4, 2020
French translation of claims
Search/Exam
Mar 4, 2020
German translation of the claims
Search/Exam
Mar 4, 2020
Letter accompanying subsequently filed items
Search/Exam
Nov 13, 2019
Nov 13, 2019
Nov 13, 2019
Intention to grant (signatures)
Search/Exam
Nov 13, 2019
Text intended for grant (clean copy)
Search/Exam
Nov 13, 2019
Nov 5, 2019
Oct 1, 2019
(Electronic) Receipt
Search/Exam
Oct 1, 2019
Amended claims with annotations
Search/Exam
Oct 1, 2019
Amended description with annotations
Search/Exam
Oct 1, 2019
Claims
Search/Exam
Oct 1, 2019
Description
Search/Exam
Oct 1, 2019
Letter accompanying subsequently filed items
Search/Exam
Oct 1, 2019
Matter concerning the application
Search/Exam
Aug 30, 2019
(Electronic) Receipt
Search/Exam
Aug 30, 2019
Amended claims with annotations
Search/Exam
Aug 30, 2019
Amended description with annotations
Search/Exam
Aug 30, 2019
Claims
Search/Exam
Aug 30, 2019
Description
Search/Exam
Aug 30, 2019
Letter accompanying subsequently filed items
Search/Exam
Aug 30, 2019
Jun 25, 2019
Jun 19, 2019
(Electronic) Receipt
Search/Exam
Jun 19, 2019
Letter accompanying subsequently filed items
Search/Exam
Jun 19, 2019
Feb 22, 2019
Annex to the communication
Search/Exam
Feb 22, 2019
Communication from the Examining Division
Search/Exam
Nov 19, 2018
(Electronic) Receipt
Search/Exam
Nov 19, 2018
Amended claims with annotations
Search/Exam
Nov 19, 2018
Annex
Search/Exam
Nov 19, 2018
Claims
Search/Exam
Nov 19, 2018
Letter accompanying subsequently filed items
Search/Exam
Nov 19, 2018
Jul 19, 2018
Annex to the communication
Search/Exam
Jul 19, 2018
Communication from the Examining Division
Search/Exam
Jul 12, 2018
Examination started
Search/Exam
Apr 26, 2018
(Electronic) Receipt
Search/Exam
Apr 26, 2018
Apr 26, 2018
Amended claims with annotations
Search/Exam
Apr 26, 2018
Amendments received before examination
Search/Exam
Apr 26, 2018
Letter accompanying subsequently filed items
Search/Exam
Oct 27, 2017
Oct 11, 2017
Oct 11, 2017
European search opinion
Search/Exam
Oct 11, 2017
Information on Search Strategy
Search/Exam
Oct 11, 2017
Supplementary European search report
Search/Exam
Sep 14, 2017
Search started
Search/Exam
May 31, 2017
May 17, 2017
(Electronic) Receipt
Search/Exam
May 17, 2017
Enquiry as to the processing of the file
Search/Exam
May 17, 2017
Letter accompanying subsequently filed items
Search/Exam
Oct 17, 2016
Oct 6, 2016
Oct 6, 2016
Submission concerning representation
Search/Exam
Oct 5, 2016
Submission concerning representation
Search/Exam
Aug 19, 2016
Aug 17, 2016
Communication to designated inventor
Search/Exam
Aug 17, 2016
Communication to designated inventor
Search/Exam
Aug 17, 2016
Communication to designated inventor
Search/Exam
Jul 20, 2016
(Electronic) Receipt
Search/Exam
Jul 20, 2016
Jul 20, 2016
Amendments received before examination
Search/Exam
Jul 20, 2016
Request for entry into the European phase
Search/Exam
Jul 12, 2016
May 9, 2016
Information on entry into European phase
Search/Exam
Jul 2, 2015
Copy of the international search report
Search/Exam
Jul 2, 2015
Published international application - A1
Search/Exam