The patent EP3146531 was granted to ABB Power Grids Switzerland on Feb 1, 2023. The application was originally filed on May 19, 2015 under application number EP15723932A. 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 |
|---|---|
| DESCRIPTION | US7128133 |
| DESCRIPTION | WO2010142346 |
| DESCRIPTION | WO2012080222 |
| DESCRIPTION | WO2012080246 |
| DESCRIPTION | WO2014053661 |
| INTERNATIONAL-SEARCH-REPORT | WO2010142353 |
| INTERNATIONAL-SEARCH-REPORT | WO2014053661 |
| OPPOSITION | DE202009009305U |
| OPPOSITION | DE202014003243U |
| OPPOSITION | EP0885841 |
| OPPOSITION | EP1091182 |
| OPPOSITION | FR1265731 |
| OPPOSITION | FR2965120 |
| OPPOSITION | JP2000102123 |
| OPPOSITION | JP2000274938 |
| OPPOSITION | JP2000288331 |
| OPPOSITION | JP2001103626 |
| OPPOSITION | JP2001143580 |
| OPPOSITION | JP2001283692 |
| OPPOSITION | JP2001314008 |
| OPPOSITION | JP2001334117 |
| OPPOSITION | JPH09285719 |
| OPPOSITION | JPH10230124 |
| OPPOSITION | US2008135817 |
| OPPOSITION | US2013277438 |
| OPPOSITION | US2014083737 |
| OPPOSITION | WO2010142346 |
| OPPOSITION | WO2010142353 |
| OPPOSITION | WO2013151741 |
NPL citations refer to non-patent references such as research papers, articles, or other publications cited during examination or opposition phases.
| Citation Phase | Reference Text |
|---|---|
| OPPOSITION | - BLUNDELL M. , ET AL. et al., "Experience with using cyrogenic techniques for recy- cling arced SF6 gas for use in switchgear", Australian Journal of Electrical & Electronics Engineering, (20070000), vol. 3, no. 3, pages 249 - 257, XP055543073 |
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(Electronic) Receipt
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Filing of the translations of the claims
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French translation of claims
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German translation of the claims
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Intention to grant (signatures)
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Text intended for grant (clean copy)
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Communication to designated inventor
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Priority search results copy provided by EPO
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(Electronic) Receipt
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Amended claims with annotations
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Amendments received before examination
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Request for entry into the European phase
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Information on entry into European phase
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PCT demand form
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Copy of the international search report
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Nov 26, 2015
Published international application - A1
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May 19, 2015
(Electronic) Receipt
PCTRO
May 19, 2015
Abstract
PCTRO
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Annex
PCTRO
May 19, 2015
Claims
PCTRO
May 19, 2015
Description
PCTRO
May 19, 2015
Drawings
PCTRO