The patent EP3548640 was granted to Tenova on Sep 21, 2022. The application was originally filed on Dec 2, 2016 under application number EP16923091A. The patent is currently recorded with a legal status of "Granted And Under Opposition".

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.
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 | Link |
|---|---|---|
| OPPOSITION | - Caifang Shen, Sun Shecheng; Chen Jianbin; Shen Caifang, "Passages; Electric arc furnace steelmaking technology and equipment ", Electric arc furnace steelmaking technology and equipment , Metallurgical Industry Press , (20010101), pages 16 - 48,479-483, ISBN 978-7-5024-2688-0, XP093125085 | - |
| OPPOSITION | - Cattalini Cristian, "CONSTEELĀ® and FLEXIBLE MODULAR FURNACE (FMF): Latest Tenova Technologies for Future SEA Steelmaking", South East Asia Iron and Steel Institute (SEAISI), Tenova Melt shops, (20160501), pages 1 - 26, XP093125080 | - |
| OPPOSITION | - G.D. Lawqrence, "ELECTRIC STEEL MELTING FURNACE DESIGN", G.D. Lawqrence, Charles R. Taylor, Electric Furnace Steelmaking, US , Iron and steel Society , (19850101), pages 7 - 19, ISBN 0-89520-165-8, XP009551633 | - |
| OPPOSITION | - Gottardi Riccardo, Adam Partyka, Stefano Miani, Maurizio Suber, "Decarburization Efficiency in EAF With Hot Metal Charge", IRON & STEEL TECHNOLOGY., AIST, WARRENDALE, PA., US, US , (20120101), vol. 1, ISSN 1547-0423, pages 811 - 821, XP093125076 | - |
| OPPOSITION | - GROSS null, "THE USE OF HOT METAL IN THE CONSTEELĀ® EAF AT WHEELING-PITTSBURGH STEEL ", AISTECH 2006 PROCEEDINGS , (2006), vol. 1 | - |
| OPPOSITION | - Milani Franco, "IMPIANTISTICA, EVOLUZIONE E FUTURO DEL FORNO ELETTRICO AD ARCO 3 - DESCRIZIONE IMPIANTO E PROCESSO", CORSO ITINERANTE AIM MACCHINA FUSORIA 26 maggio 2011, SIEMENS VAI Metals Technologies, (20110526), pages 1 - 30, XP093125083 | - |
| OPPOSITION | - Oza Riddhi, Dutta S K, "Aspect of Design and Developments in EAF", IRON & STEEL REVIEW, (20141201), vol. 58, no. 7, ISSN 0578-7661, pages 202 - 210, XP093125078 | - |
| OPPOSITION | - Ramirez W. Fred, Chung, Serena, "Grantee Research Project Results Final Report: Optimal Operation of Electric Arc Furnaces (EAF) to Minimize the Generation of Air Pollutants at the Source", Grantee Research Project Results, US EPA, (20230428), pages 1 - 22, Grantee Research Project Results, URL: https://cfpub.epa.gov/ncer_abstracts/index.cfm/fuseaction/display.abstractDetail/abstract_id/957/report/F, (20240129), XP093125086 | - |
| OPPOSITION | - Satyendra, "Understanding Steel Making Operations in Basic Oxygen Furnace", IspatGuru, (20150302), pages 1 - 9, IspatGuru, URL: https://www.ispatguru.com/understanding-steel-making-operations-in-basic-oxygen-furnace/, (20240129), XP093125088 | - |
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Decision to grant a European patent
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Jul 27, 2022
Jul 18, 2022
(Electronic) Receipt
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Jul 18, 2022
Letter accompanying subsequently filed items
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Jul 18, 2022
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(Electronic) Receipt
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Jul 13, 2022
Filing of the translations of the claims
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Jul 13, 2022
French translation of claims
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Jul 13, 2022
German translation of the claims
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Jul 13, 2022
Letter accompanying subsequently filed items
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Jul 11, 2022
(Electronic) Receipt
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Jul 11, 2022
Annexes in respect of a client data request
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Jun 29, 2022
(Electronic) Receipt
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Jun 29, 2022
Annexes in respect of a client data request
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Jun 29, 2022
Letter accompanying subsequently filed items
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Jun 29, 2022
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Intention to grant (signatures)
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Mar 7, 2022
Text intended for grant (clean copy)
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Mar 7, 2022
Feb 17, 2022
Examination started
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Oct 21, 2020
(Electronic) Receipt
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Oct 21, 2020
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Oct 21, 2020
Amended claims with annotations
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Oct 21, 2020
Amended claims with annotations
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Oct 21, 2020
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Amended description with annotations
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Oct 21, 2020
Amendments received before examination
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Oct 21, 2020
Letter accompanying subsequently filed items
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European search opinion
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Apr 3, 2020
Information on Search Strategy
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Apr 3, 2020
Supplementary European search report
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Mar 26, 2020
Search started
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Dec 11, 2019
(Electronic) Receipt
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Dec 11, 2019
Letter accompanying subsequently filed items
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Dec 11, 2019
Matter concerning the application
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Sep 11, 2019
Jul 31, 2019
Refund of fees
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Jul 17, 2019
Payment submission rejected
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Jul 9, 2019
Jul 5, 2019
Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Jun 17, 2019
May 29, 2019
(Electronic) Receipt
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May 29, 2019
Request for entry into the European phase
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May 29, 2019
Submission concerning representation
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Apr 12, 2019
Information on entry into European phase
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Mar 29, 2019
Notification of the recording of a change
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Jun 7, 2018
Copy of the international search report
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Jun 7, 2018
Published international application - A1
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Jun 7, 2018
Published international application - A1
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