Magnesium Oxide Powder, And Production Method Therefor

Patent No. EP3456687 (titled "Magnesium Oxide Powder, And Production Method Therefor") was filed by Konoshima Chemical on May 1, 2017. The application was issued on May 14, 2025.

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
DEAD SEA BROMINE	Jul 6, 2022	HOYNG ROKH MONEGIER

Dossier Documents

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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Apr 17, 2025
Decision to maintain the European patent in amended form
Apr 17, 2025
Decision to maintain the European patent in amended form
Apr 7, 2025
(Electronic) Receipt
Apr 7, 2025
Filing of the translation of the amended claims
Apr 7, 2025
French translation of claims
Apr 7, 2025
German translation of the claims
Apr 7, 2025
Letter accompanying subsequently filed items
Mar 20, 2025
Communication of bibliographic data
Mar 20, 2025
Communication to opponent concerning maintenance
Mar 20, 2025
Communication with request to file translations
Mar 13, 2025
Maintenance of the patent with the documents specified in the final decision
Dec 11, 2024
Annex to the communication - opposition
Dec 11, 2024
Brief communication - Opposition proceedings
Dec 11, 2024
Brief communication - Opposition proceedings
Dec 11, 2024
Druckexemplar in opposition procedure
Dec 11, 2024
Grounds for the decision (Annex) - opposition
Dec 11, 2024
Interlocutory decision in opposition proceedings
Dec 11, 2024
Interlocutory decision in opposition proceedings
Dec 11, 2024
Means of redress
Dec 11, 2024
Minutes of the oral proceedings (Opposition Division) - conclusion of the proceedings
Dec 11, 2024
Minutes of the oral proceedings (Opposition Division) - introduction of the parties
Dec 11, 2024
Provision of a copy of the minutes - opposition procedure
Dec 11, 2024
Provision of a copy of the minutes - opposition procedure
Dec 11, 2024
Scanned annex to a communication - opposition procedure
Dec 9, 2024
Decision of the Opposition Division and instruction
Nov 26, 2024
Information about the result of oral proceedings
Nov 7, 2024
Brief communication - Opposition proceedings
Oct 30, 2024
(Electronic) Receipt
Oct 30, 2024
Citation in opposition procedure - 013
Oct 30, 2024
Consolidated list of cited opposition documents
Oct 30, 2024
Letter accompanying subsequently filed items
Oct 30, 2024
Written submission in preparation to/during oral proceedings
Oct 2, 2024
Brief communication - Opposition proceedings
Sep 26, 2024
(Electronic) Receipt
Sep 26, 2024
Citation in opposition procedure - 011
Sep 26, 2024
Citation in opposition procedure - 012
Sep 26, 2024
Letter accompanying subsequently filed items
Sep 26, 2024
Written submission in preparation to/during oral proceedings
Sep 26, 2024
Written submission in preparation to/during oral proceedings
Sep 25, 2024
Brief communication - Opposition proceedings
Sep 17, 2024
(Electronic) Receipt
Sep 17, 2024
Auxiliary request during Opposition procedure
Sep 17, 2024
Auxiliary request during Opposition procedure
Sep 17, 2024
Auxiliary request during Opposition procedure - 01
Sep 17, 2024
Auxiliary request during Opposition procedure - 02
Sep 17, 2024
Letter accompanying subsequently filed items
Sep 17, 2024
Submission concerning representation
Sep 17, 2024
Written submission in preparation to/during oral proceedings
Nov 30, 2023
(Electronic) Receipt
Nov 30, 2023
Advice of delivery
Nov 30, 2023
Letter accompanying subsequently filed items
Nov 29, 2023
Annex to the communication - opposition
Nov 29, 2023
Information concerning oral proceedings
Nov 29, 2023
Scanned annex to a communication - opposition procedure
Nov 29, 2023
Summons to attend oral proceedings
Nov 29, 2023
Summons to attend oral proceedings
Nov 29, 2023
Transmittal of decision / summons - opposition
Nov 29, 2023
Transmittal of decision / summons - opposition
Nov 30, 2022
Brief communication - Opposition proceedings
Nov 25, 2022
(Electronic) Receipt
Nov 25, 2022
Citation in opposition procedure - 008
Nov 25, 2022
Citation in opposition procedure - 009
Nov 25, 2022
Citation in opposition procedure - 010
Nov 25, 2022
Letter accompanying subsequently filed items
Nov 25, 2022
Main request during Opposition procedure
Nov 25, 2022
Reply of the patent proprietor to the notice(s) of opposition
Jul 20, 2022
Communication of a notice of opposition and request to file observations
Jul 20, 2022
Notice of further oppositions to opponent(s)
Jul 11, 2022
Communication of a notice of opposition - first information to patent proprietor
Jul 6, 2022
(Electronic) Receipt
Jul 6, 2022
Citation in opposition procedure - 001
Jul 6, 2022
Citation in opposition procedure - 002
Jul 6, 2022
Citation in opposition procedure - 003
Jul 6, 2022
Citation in opposition procedure - 003
Jul 6, 2022
Citation in opposition procedure - 004
Jul 6, 2022
Citation in opposition procedure - 004
Jul 6, 2022
Citation in opposition procedure - 005
Jul 6, 2022
Citation in opposition procedure - 006
Jul 6, 2022
Citation in opposition procedure - 007
Jul 6, 2022
Notice of opposition
Jul 6, 2022
Notice of opposition
Oct 19, 2021
Transmission of the certificate for a European patent pursuant to Rule 74 EPC
Sep 9, 2021
Decision to grant a European patent
Aug 30, 2021
(Electronic) Receipt
Aug 30, 2021
Filing of the translations of the claims
Aug 30, 2021
French translation of claims
Aug 30, 2021
German translation of the claims
Aug 30, 2021
Letter accompanying subsequently filed items
Apr 29, 2021
Bibliographic data of the European patent application
Apr 29, 2021
Communication about intention to grant a European patent
Apr 29, 2021
Intention to grant (signatures)
Apr 29, 2021
Text intended for grant (clean copy)
Apr 29, 2021
Text intended for grant (version for approval)
Nov 12, 2020
(Electronic) Receipt
Nov 12, 2020
Amended claims with annotations
Nov 12, 2020
Amended description with annotations
Nov 12, 2020
Claims
Nov 12, 2020
Description
Nov 12, 2020
Letter accompanying subsequently filed items
Nov 12, 2020
Reply to communication from the Examining Division
Sep 30, 2020
Annex to the communication
Sep 30, 2020
Communication from the Examining Division
Jun 30, 2020
(Electronic) Receipt
Jun 30, 2020
Amended claims with annotations
Jun 30, 2020
Amended description with annotations
Jun 30, 2020
Claims
Jun 30, 2020
Description
Jun 30, 2020
Letter accompanying subsequently filed items
Jun 30, 2020
Reply to communication from the Examining Division
Mar 26, 2020
Annex to the communication
Mar 26, 2020
Communication from the Examining Division
Feb 12, 2020
Payment submission rejected
Nov 20, 2019
(Electronic) Receipt
Nov 20, 2019
Letter accompanying subsequently filed items
Nov 20, 2019
Reply to communication from the Examining Division
Nov 19, 2019
Annex to the communication
Nov 19, 2019
Communication from the Examining Division
Nov 13, 2019
Examination started
Jun 13, 2019
(Electronic) Receipt
Jun 13, 2019
Letter accompanying subsequently filed items
Jun 13, 2019
Reply to Written Opinion prepared by the EPO
Mar 19, 2019
Invitation to declare maintenance of the application and to correct deficiencies in the Written Opinion/amend application
Feb 28, 2019
Communication regarding the transmission of the European search report
Feb 28, 2019
Document annexed to the Extended European Search Report
Feb 28, 2019
Document annexed to the Extended European Search Report
Feb 28, 2019
Document annexed to the Extended European Search Report
Feb 28, 2019
European search opinion
Feb 28, 2019
Information on Search Strategy
Feb 28, 2019
Supplementary European search report
Feb 20, 2019
Notification of forthcoming publication
Feb 13, 2019
Search started
Dec 18, 2018
Communication to designated inventor
Dec 18, 2018
Communication to designated inventor
Dec 4, 2018
Submission concerning representation
Nov 28, 2018
Copy of the international preliminary report on patentability
Nov 28, 2018
Translation of the international preliminary report on patentability
Mar 1, 2018
Information regarding early processing
Jan 26, 2018
(Electronic) Receipt
Jan 26, 2018
Abstract
Jan 26, 2018
Claims
Jan 26, 2018
Description
Jan 26, 2018
Drawings
Jan 26, 2018
Request for entry into the European phase
Dec 5, 2017
Priority document (electronically transmitted)
Nov 16, 2017
Copy of the international search report
Nov 16, 2017
Copy of the translated international search report
Nov 16, 2017
International publication pamphlet

EP3456687

KONOSHIMA CHEMICAL

Application Number: EP17796047A
Filing Date: May 1, 2017
Status: Patent Maintained As Amended; Apr 11, 2025
Publication Date: May 14, 2025
External Links: Slate, Register , Google Patents

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Magnesium Oxide Powder, And Production Method Therefor

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Dossier Documents

EP3456687