Alpha-Alumina Flakes

Patent No. EP2799397 (titled "Alpha-Alumina Flakes") was filed by Merck Patent on Apr 9, 2014. The application was issued on Jun 20, 2018.

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
AWA SWEDEN	Mar 20, 2019	AWA SWEDEN
PPG INDUSTRIES	Mar 19, 2019	F & E PATENT

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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Aug 28, 2025
Communication for party to proceedings/third party
Aug 26, 2025
Request for change of client data cannot be registered anymore
Jul 17, 2025
Annexes in respect of a client data request
Jul 17, 2025
Submission concerning a transfer of rights (applicant)
Jan 4, 2023
Communication to the parties concerning termination of the opposition proceedings - opposition rejected - no appeal lodged
Jan 4, 2023
Communication to the parties concerning the termination of the opposition proceedings (opponent)
Jan 4, 2023
Communication to the parties concerning the termination of the opposition proceedings (opponent)
Dec 23, 2022
Termination of the opposition proceedings with maintenance of patent
Sep 20, 2022
Advice of delivery
Sep 19, 2022
Advice of delivery
Sep 13, 2022
Advice of delivery
Sep 13, 2022
Annex to the communication - opposition
Sep 13, 2022
Decision of the Opposition Division and instruction
Sep 13, 2022
Decision rejecting the opposition
Sep 13, 2022
Decision rejecting the opposition
Sep 13, 2022
Decision rejecting the opposition
Sep 13, 2022
Grounds for the decision (Annex) - opposition
Sep 13, 2022
Means of redress
Sep 13, 2022
Minutes of the oral proceedings (Opposition Division) - conclusion of the proceedings
Sep 13, 2022
Minutes of the oral proceedings (Opposition Division) - conclusion of the proceedings
Sep 13, 2022
Minutes of the oral proceedings (Opposition Division) - introduction of the parties
Sep 13, 2022
Provision of a copy of the minutes - opposition procedure
Sep 13, 2022
Provision of a copy of the minutes - opposition procedure
Sep 13, 2022
Provision of a copy of the minutes - opposition procedure
Sep 13, 2022
Transmittal of decision / summons - opposition
Sep 13, 2022
Transmittal of decision / summons - opposition
Sep 13, 2022
Transmittal of decision / summons - opposition
Jun 21, 2022
Information about the result of oral proceedings
May 12, 2022
(Electronic) Receipt
May 12, 2022
Brief communication - Opposition proceedings
May 12, 2022
Brief communication - Opposition proceedings
May 11, 2022
(Electronic) Receipt
May 9, 2022
(Electronic) Receipt
Apr 28, 2022
Brief communication - Opposition proceedings
Apr 28, 2022
Brief communication - Opposition proceedings
Apr 26, 2022
Brief communication - Opposition proceedings
Apr 26, 2022
Brief communication - Opposition proceedings
Apr 26, 2022
Brief communication - Opposition proceedings
Apr 26, 2022
Brief communication - Opposition proceedings
Apr 22, 2022
Notification concerning the date of oral proceedings
Apr 22, 2022
Notification concerning the date of oral proceedings
Apr 22, 2022
Notification concerning the date of oral proceedings
Apr 21, 2022
(Electronic) Receipt
Apr 21, 2022
(Electronic) Receipt
Apr 21, 2022
Auxiliary request during Opposition procedure - 02
Apr 21, 2022
Citation in opposition procedure - 035
Apr 21, 2022
Consolidated list of cited opposition documents
Apr 21, 2022
Letter accompanying subsequently filed items
Apr 21, 2022
Letter accompanying subsequently filed items
Apr 21, 2022
Written submission in preparation to/during oral proceedings
Apr 21, 2022
Written submission in preparation to/during oral proceedings
Apr 20, 2022
(Electronic) Receipt
Apr 20, 2022
Letter accompanying subsequently filed items
Apr 20, 2022
Written submission in preparation to/during oral proceedings
Apr 14, 2022
Brief communication - Opposition proceedings
Apr 14, 2022
Brief communication - Opposition proceedings
Apr 14, 2022
Brief communication - Opposition proceedings
Feb 15, 2022
Brief communication - Opposition proceedings
Feb 15, 2022
Brief communication - Opposition proceedings
Feb 15, 2022
Communication of amended entries
Feb 3, 2022
Request concerning representative opponent
Oct 21, 2021
Advice of delivery
Oct 15, 2021
Advice of delivery
Oct 13, 2021
Advice of delivery
Oct 13, 2021
Annex to the communication - opposition
Oct 13, 2021
Information concerning oral proceedings
Oct 13, 2021
Summons to attend oral proceedings
Oct 13, 2021
Summons to attend oral proceedings
Oct 13, 2021
Summons to attend oral proceedings
Oct 13, 2021
Transmittal of decision / summons - opposition
Oct 13, 2021
Transmittal of decision / summons - opposition
Oct 13, 2021
Transmittal of decision / summons - opposition
May 20, 2021
Communication of amended entries
Apr 30, 2021
Brief communication - Opposition proceedings
Apr 30, 2021
Brief communication - Opposition proceedings
Apr 26, 2021
(Electronic) Receipt
Apr 26, 2021
Citation in opposition procedure - 034
Apr 26, 2021
Letter accompanying subsequently filed items
Apr 26, 2021
Letter regarding the opposition procedure (no time limit)
Apr 15, 2021
Request concerning representative opponent
Feb 10, 2021
Brief communication - Opposition proceedings
Feb 10, 2021
Brief communication - Opposition proceedings
Feb 4, 2021
(Electronic) Receipt
Feb 4, 2021
Letter regarding the opposition procedure (no time limit)
Feb 4, 2021
Reply to an examination report in opposition proceedings
Sep 24, 2020
Annex to the communication - opposition
Sep 24, 2020
Communication inviting the parties to file observations
Sep 24, 2020
Internal form - Opposition/addressees
Aug 19, 2020
Brief communication - Opposition proceedings
Aug 19, 2020
Brief communication - Opposition proceedings
Aug 18, 2020
Oral proceedings: reply to date proposed
Aug 17, 2020
Brief communication - Opposition proceedings
Aug 17, 2020
Brief communication - Opposition proceedings
Aug 17, 2020
Notification concerning the date of oral proceedings
Aug 17, 2020
Notification concerning the date of oral proceedings
Aug 17, 2020
Notification concerning the date of oral proceedings
Aug 14, 2020
(Electronic) Receipt
Aug 14, 2020
Letter accompanying subsequently filed items
Aug 14, 2020
Oral proceedings: reply to date proposed
Aug 12, 2020
(Electronic) Receipt
Aug 12, 2020
Letter accompanying subsequently filed items
Aug 12, 2020
Oral proceedings: reply to date proposed
Jul 31, 2020
Brief communication - Opposition proceedings
Jul 31, 2020
Brief communication - Opposition proceedings
Jul 31, 2020
Brief communication - Opposition proceedings
Jul 31, 2020
Brief communication - Opposition proceedings
Jul 30, 2020
Brief communication - Opposition proceedings
Jul 30, 2020
Brief communication - Opposition proceedings
Jul 28, 2020
(Electronic) Receipt
Jul 28, 2020
Brief communication - Opposition proceedings
Jul 28, 2020
Brief communication - Opposition proceedings
Jul 28, 2020
Letter accompanying subsequently filed items
Jul 28, 2020
Oral proceedings: reply to date proposed
Jul 28, 2020
Written submission in preparation to/during oral proceedings
Jul 27, 2020
(Electronic) Receipt
Jul 27, 2020
Letter accompanying subsequently filed items
Jul 27, 2020
Oral proceedings: reply to date proposed
Jul 22, 2020
(Electronic) Receipt
Jul 22, 2020
(Electronic) Receipt
Jul 22, 2020
Letter regarding the opposition procedure (no time limit)
Jul 22, 2020
Letter regarding the opposition procedure (no time limit)
Jul 22, 2020
Oral proceedings: reply to date proposed
Jul 22, 2020
Written submission in preparation to/during oral proceedings
Jul 14, 2020
Brief communication - Opposition proceedings
Jul 14, 2020
Brief communication - Opposition proceedings
Jul 13, 2020
Notification concerning the date of oral proceedings
Jul 13, 2020
Notification concerning the date of oral proceedings
Jul 13, 2020
Notification concerning the date of oral proceedings
Jul 9, 2020
(Electronic) Receipt
Jul 9, 2020
Citation in opposition procedure - 032
Jul 9, 2020
Citation in opposition procedure - 032
Jul 9, 2020
Citation in opposition procedure - 032
Jul 9, 2020
Citation in opposition procedure - 033
Jul 9, 2020
Letter regarding the opposition procedure (no time limit)
Jul 9, 2020
Written submission in preparation to/during oral proceedings
Mar 10, 2020
Advice of delivery
Mar 4, 2020
Advice of delivery
Mar 2, 2020
Advice of delivery
Feb 27, 2020
Acknowledgement of a document
Feb 27, 2020
Acknowledgement of a document
Feb 27, 2020
Acknowledgement of a document
Feb 27, 2020
Annex to the communication - opposition
Feb 27, 2020
Information concerning oral proceedings
Feb 27, 2020
Scanned annex to a communication - opposition procedure
Feb 27, 2020
Summons to attend oral proceedings
Feb 27, 2020
Summons to attend oral proceedings
Feb 27, 2020
Summons to attend oral proceedings
Jan 8, 2020
Brief communication - Opposition proceedings
Jan 8, 2020
Brief communication - Opposition proceedings
Dec 27, 2019
(Electronic) Receipt
Dec 27, 2019
Citation in opposition procedure - 030
Dec 27, 2019
Citation in opposition procedure - 031
Dec 27, 2019
Letter accompanying subsequently filed items
Dec 27, 2019
Reply from the opponent to submission of proprietor
Oct 17, 2019
Brief communication - Opposition proceedings
Oct 17, 2019
Brief communication - Opposition proceedings
Oct 14, 2019
(Electronic) Receipt
Oct 14, 2019
Auxiliary request during Opposition procedure
Oct 14, 2019
Auxiliary request during Opposition procedure
Oct 14, 2019
Auxiliary request during Opposition procedure
Oct 14, 2019
Auxiliary request during Opposition procedure
Oct 14, 2019
Auxiliary request during Opposition procedure
Oct 14, 2019
Auxiliary request during Opposition procedure - 01
Oct 14, 2019
Auxiliary request during Opposition procedure - 02
Oct 14, 2019
Auxiliary request during Opposition procedure - 03
Oct 14, 2019
Auxiliary request during Opposition procedure - 04
Oct 14, 2019
Auxiliary request during Opposition procedure - 05
Oct 14, 2019
Citation in opposition procedure - 029
Oct 14, 2019
Letter accompanying subsequently filed items
Oct 14, 2019
Reply of the patent proprietor to the notice(s) of opposition
Jul 24, 2019
Brief communication - Opposition proceedings
Jul 24, 2019
Brief communication - Opposition proceedings
Jul 24, 2019
Grant of extension of time limit (opposition procedure)
Jul 17, 2019
Communication concerning the filing of a power of attorney
Jul 17, 2019
Communication of amended entries concerning the representative
Jul 15, 2019
(Electronic) Receipt
Jul 15, 2019
Letter accompanying subsequently filed items
Jul 15, 2019
Request for extension of time limit
Jul 11, 2019
Brief communication - Opposition proceedings
Jul 11, 2019
Brief communication - Opposition proceedings
Jul 8, 2019
(Electronic) Receipt
Jul 8, 2019
Letter accompanying subsequently filed items
Jul 8, 2019
Submission concerning change of applicant's representative
Apr 3, 2019
Communication of a notice of opposition and request to file observations
Apr 3, 2019
Notice of further oppositions to opponent(s)
Apr 3, 2019
Notice of further oppositions to opponent(s)
Mar 26, 2019
Brief communication - Opposition proceedings
Mar 25, 2019
Communication of a notice of opposition - first information to patent proprietor
Mar 25, 2019
Communication of a notice of opposition - first information to patent proprietor
Mar 20, 2019
(Electronic) Receipt
Mar 20, 2019
(Electronic) Receipt
Mar 20, 2019
Citation in opposition procedure
Mar 20, 2019
Citation in opposition procedure - 017
Mar 20, 2019
Citation in opposition procedure - 018
Mar 20, 2019
Citation in opposition procedure - 019
Mar 20, 2019
Citation in opposition procedure - 020
Mar 20, 2019
Citation in opposition procedure - 021
Mar 20, 2019
Citation in opposition procedure - 022
Mar 20, 2019
Citation in opposition procedure - 023
Mar 20, 2019
Citation in opposition procedure - 024
Mar 20, 2019
Citation in opposition procedure - 025
Mar 20, 2019
Citation in opposition procedure - 026
Mar 20, 2019
Citation in opposition procedure - 027
Mar 20, 2019
Citation in opposition procedure - 028
Mar 20, 2019
Letter accompanying subsequently filed items
Mar 20, 2019
Notice of opposition
Mar 20, 2019
Notice of opposition
Mar 20, 2019
Notice of opposition
Mar 20, 2019
Patent document cited during the opposition procedure
Mar 19, 2019
(Electronic) Receipt
Mar 19, 2019
Any annexes (other than citation) to an opposition letter
Mar 19, 2019
Citation in opposition procedure - 001
Mar 19, 2019
Citation in opposition procedure - 002
Mar 19, 2019
Citation in opposition procedure - 003
Mar 19, 2019
Citation in opposition procedure - 004
Mar 19, 2019
Citation in opposition procedure - 005
Mar 19, 2019
Citation in opposition procedure - 006
Mar 19, 2019
Citation in opposition procedure - 007
Mar 19, 2019
Citation in opposition procedure - 008
Mar 19, 2019
Citation in opposition procedure - 010
Mar 19, 2019
Citation in opposition procedure - 011
Mar 19, 2019
Citation in opposition procedure - 012
Mar 19, 2019
Citation in opposition procedure - 013
Mar 19, 2019
Citation in opposition procedure - 014
Mar 19, 2019
Citation in opposition procedure - 015
Mar 19, 2019
Citation in opposition procedure - 016
Mar 19, 2019
Letter accompanying subsequently filed items
Mar 19, 2019
Notice of opposition
Jul 2, 2018
Transmission of the certificate for a European patent pursuant to Rule 74 EPC
May 25, 2018
Decision to grant a European patent
May 9, 2018
(Electronic) Receipt
May 9, 2018
Filing of the translations of the claims
May 9, 2018
French translation of claims
May 9, 2018
German translation of the claims
May 9, 2018
Letter accompanying subsequently filed items
Jan 3, 2018
Bibliographic data of the European patent application
Jan 3, 2018
Communication about intention to grant a European patent
Jan 3, 2018
Intention to grant (signatures)
Jan 3, 2018
Text intended for grant (clean copy)
Jan 3, 2018
Text intended for grant (version for approval)
Sep 12, 2017
Decision to allow further processing
Sep 5, 2017
Amended claims with annotations
Sep 5, 2017
Claims
Sep 5, 2017
Reply to communication from the Examining Division
Sep 1, 2017
Amended claims with annotations
Sep 1, 2017
Claims
Sep 1, 2017
Letter accompanying subsequently filed items
Sep 1, 2017
Payment of fees and costs
Sep 1, 2017
Payment of fees and costs
Sep 1, 2017
Reply to communication from the Examining Division
Jun 26, 2017
Application deemed to be withdrawn (no reply to communication from the Examining Division)
Mar 29, 2017
Grant of extension of time limit (examination procedure)
Mar 27, 2017
Request for extension of time limit to communication from the Examining Division
Mar 23, 2017
Letter accompanying subsequently filed items
Mar 23, 2017
Request for extension of time limit to communication from the Examining Division
Nov 17, 2016
Annex to the communication
Nov 17, 2016
Communication from the Examining Division
Aug 16, 2016
Reply to communication from the Examining Division
Aug 15, 2016
Letter accompanying subsequently filed items
Aug 15, 2016
Reply to communication from the Examining Division
May 27, 2016
Grant of extension of time limit (examination procedure)
May 23, 2016
Request for extension of time limit to communication from the Examining Division
May 19, 2016
Letter accompanying subsequently filed items
May 19, 2016
Request for extension of time limit to communication from the Examining Division
Feb 4, 2016
Annex to the communication
Feb 4, 2016
Communication from the Examining Division
Jan 28, 2016
Examination started
Nov 25, 2015
Acknowledgement of receipt of third party observations
Nov 25, 2015
Transmittal of third party observations to applicant
Nov 17, 2015
(Electronic) Receipt
Nov 17, 2015
Letter accompanying subsequently filed items
Nov 17, 2015
Observations by third parties
Nov 17, 2015
Observations by third parties
Nov 17, 2015
Patent document filed by a Third party
Nov 17, 2015
Patent document filed by a Third party
May 21, 2015
Amended claims filed after receipt of (European) search report
May 21, 2015
Amended claims with annotations
May 21, 2015
Amendments received before examination
May 19, 2015
Amended claims filed after receipt of (European) search report
May 19, 2015
Amended claims with annotations
May 19, 2015
Amendments received before examination
May 19, 2015
Letter accompanying subsequently filed items
Nov 24, 2014
Invitation to confirm maintenance of the application and to correct deficiencies in the Written Opinion/amend application
Oct 21, 2014
Communication regarding the transmission of the European search report
Oct 21, 2014
European search opinion
Oct 21, 2014
European search report
Oct 13, 2014
Search started
Oct 8, 2014
Notification of forthcoming publication
Jul 10, 2014
Confirmation of receipt of (electronically) transmitted priority document
Jun 10, 2014
Priority document (electronically transmitted)
Jun 3, 2014
Communication to designated inventor
Jun 3, 2014
Communication to designated inventor
Jun 3, 2014
Communication to designated inventor
Jun 3, 2014
Communication to designated inventor
Jun 3, 2014
Communication to designated inventor
Jun 3, 2014
Communication to designated inventor
Jun 3, 2014
Communication to designated inventor
Jun 3, 2014
Communication to designated inventor
May 8, 2014
Brief communication to applicant/representative
Apr 9, 2014
Abstract
Apr 9, 2014
Claims
Apr 9, 2014
Description
Apr 9, 2014
Designation of inventor
Apr 9, 2014
Payment of fees and costs
Apr 9, 2014
Request for grant of a European patent

EP2799397

MERCK PATENT

Application Number: EP14001291A
Filing Date: Apr 9, 2014
Status: Opposition Rejected; Dec 30, 2022
Publication Date: Jun 20, 2018
External Links: Slate, Register , Google Patents

IP Verse

Alpha-Alumina Flakes

Patent Summary

Patent Family

Patent Oppositions (2)

Dossier Documents

EP2799397