Air Conditioner

Patent No. EP3730866 (titled "Air Conditioner") was filed by Daikin Industries on Dec 18, 2018. The application was issued on Jul 9, 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
MEXICHEM FLUOR DE CV	Apr 8, 2026	POTTER CLARKSON

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 21, 2026
Communication of a notice of opposition and request to file observations
Apr 21, 2026
Notice of further oppositions to opponent(s)
Apr 13, 2026
Communication of a notice of opposition - first information to patent proprietor
Apr 8, 2026
(Electronic) Receipt
Apr 8, 2026
Any annexes (other than citation) to an opposition letter
Apr 8, 2026
Citation in opposition procedure
Apr 8, 2026
Citation in opposition procedure - 001
Apr 8, 2026
Citation in opposition procedure - 003
Apr 8, 2026
Citation in opposition procedure - 004
Apr 8, 2026
Citation in opposition procedure - 004
Apr 8, 2026
Citation in opposition procedure - 005
Apr 8, 2026
Citation in opposition procedure - 005
Apr 8, 2026
Citation in opposition procedure - 006
Apr 8, 2026
Citation in opposition procedure - 007
Apr 8, 2026
Citation in opposition procedure - 008
Apr 8, 2026
Citation in opposition procedure - 009
Apr 8, 2026
Citation in opposition procedure - 010
Apr 8, 2026
Citation in opposition procedure - 011
Apr 8, 2026
Citation in opposition procedure - 012
Apr 8, 2026
Citation in opposition procedure - 013
Apr 8, 2026
Citation in opposition procedure - 013
Apr 8, 2026
Citation in opposition procedure - 014
Apr 8, 2026
Citation in opposition procedure - 014
Apr 8, 2026
Citation in opposition procedure - 015
Apr 8, 2026
Citation in opposition procedure - 015
Apr 8, 2026
Consolidated list of cited opposition documents
Apr 8, 2026
Notice of opposition
Apr 8, 2026
Notice of opposition
Jul 22, 2025
Transmission of the certificate for a European patent pursuant to Rule 74 EPC
Jun 13, 2025
Decision to grant a European patent
Jun 2, 2025
(Electronic) Receipt
Jun 2, 2025
Filing of the translations of the claims
Jun 2, 2025
French translation of claims
Jun 2, 2025
German translation of the claims
Jun 2, 2025
Letter accompanying subsequently filed items
Feb 18, 2025
Annex to the communication about intention to grant a European patent
Feb 18, 2025
Bibliographic data of the European patent application
Feb 18, 2025
Communication about intention to grant a European patent
Feb 18, 2025
Intention to grant (signatures)
Feb 18, 2025
Text intended for grant (clean copy)
Feb 18, 2025
Text intended for grant (version for approval)
Jan 24, 2025
(Electronic) Receipt
Jan 24, 2025
Letter accompanying subsequently filed items
Jan 24, 2025
Request for correction/amendment of the text proposed for grant sent from 01.04.2012
Nov 14, 2024
Annex to the communication about intention to grant a European patent
Nov 14, 2024
Bibliographic data of the European patent application
Nov 14, 2024
Communication about intention to grant a European patent
Nov 14, 2024
Intention to grant (signatures)
Nov 14, 2024
Text intended for grant (clean copy)
Nov 14, 2024
Text intended for grant (version for approval)
Oct 16, 2024
(Electronic) Receipt
Oct 16, 2024
Amended description with annotations
Oct 16, 2024
Description
Oct 16, 2024
Letter accompanying subsequently filed items
Oct 16, 2024
Request for correction/amendment of the text proposed for grant sent from 01.04.2012
Jul 16, 2024
Annex to the communication about intention to grant a European patent
Jul 16, 2024
Bibliographic data of the European patent application
Jul 16, 2024
Communication about intention to grant a European patent
Jul 16, 2024
Intention to grant (signatures)
Jul 16, 2024
Text intended for grant (clean copy)
Jul 16, 2024
Text intended for grant (version for approval)
Feb 14, 2024
(Electronic) Receipt
Feb 14, 2024
Amended claims with annotations
Feb 14, 2024
Amended description with annotations
Feb 14, 2024
Claims
Feb 14, 2024
Description
Feb 14, 2024
Letter accompanying subsequently filed items
Feb 14, 2024
Reply to communication from the Examining Division
Oct 10, 2023
Annex to the communication
Oct 10, 2023
Communication from the Examining Division
Apr 18, 2023
(Electronic) Receipt
Apr 18, 2023
Amended claims with annotations
Apr 18, 2023
Amended description with annotations
Apr 18, 2023
Claims
Apr 18, 2023
Description
Apr 18, 2023
Letter accompanying subsequently filed items
Apr 18, 2023
Reply to communication from the Examining Division
Dec 19, 2022
Communication of the registration of a transfer or change of name and/or address
Dec 14, 2022
Annex to the communication
Dec 14, 2022
Communication from the Examining Division
Dec 8, 2022
Examination started
Dec 7, 2022
Annexes in respect of a client data request
Dec 7, 2022
Letter accompanying subsequently filed items
Dec 7, 2022
Submission concerning change of applicant's address
Dec 7, 2022
Submission concerning change of applicant's address
Aug 5, 2022
Decision to allow further processing
Jul 27, 2022
(Electronic) Receipt
Jul 27, 2022
Amended claims filed after receipt of (European) search report
Jul 27, 2022
Amended claims with annotations
Jul 27, 2022
Amended description filed after receipt of (European) search report
Jul 27, 2022
Amended description with annotations
Jul 27, 2022
Letter accompanying subsequently filed items
Jul 27, 2022
Request for further processing
Jun 1, 2022
Application deemed to be withdrawn (non-reply to Written Opinion)
May 6, 2022
(Electronic) Receipt
May 6, 2022
Letter accompanying subsequently filed items
May 6, 2022
Maintenance of the application
Oct 29, 2021
Invitation to declare maintenance of the application and to correct deficiencies in the Written Opinion/amend application
Sep 14, 2021
Communication regarding the transmission of the European search report
Sep 14, 2021
European search opinion
Sep 14, 2021
Information on Search Strategy
Sep 14, 2021
Supplementary European search report
Sep 3, 2021
Search started
Dec 11, 2020
(Electronic) Receipt
Dec 11, 2020
Amended claims filed after receipt of (European) search report
Dec 11, 2020
Amended claims with annotations
Dec 11, 2020
Amended description filed after receipt of (European) search report
Dec 11, 2020
Amended description with annotations
Dec 11, 2020
Amended drawings filed after receipt of (European) search report
Dec 11, 2020
Amended drawings with annotations
Dec 11, 2020
Amendments received before examination
Dec 11, 2020
Letter accompanying subsequently filed items
Sep 30, 2020
Notification of forthcoming publication
Jul 28, 2020
Communication regarding possible amendment of the application/payment of claims fee
Jul 24, 2020
Communication to designated inventor
Jul 24, 2020
Communication to designated inventor
Jul 24, 2020
Communication to designated inventor
Jul 24, 2020
Communication to designated inventor
Jul 24, 2020
Communication to designated inventor
Jul 24, 2020
Communication to designated inventor
Jul 24, 2020
Communication to designated inventor
Jul 24, 2020
Communication to designated inventor
Jul 24, 2020
Communication to designated inventor
Jul 13, 2020
(Electronic) Receipt
Jul 13, 2020
Abstract
Jul 13, 2020
Claims
Jul 13, 2020
Description
Jul 13, 2020
Drawings
Jul 13, 2020
Request for entry into the European phase
Jul 6, 2020
Copy of the international preliminary report on patentability
Jul 6, 2020
Translation of the international preliminary report on patentability
May 4, 2020
Information on entry into European phase
Jul 19, 2019
Priority document (electronically transmitted)
Jul 19, 2019
Priority document (electronically transmitted)
Jul 19, 2019
Priority document (electronically transmitted)
Jul 19, 2019
Priority document (electronically transmitted)
Jul 19, 2019
Priority document (electronically transmitted)
Jul 19, 2019
Priority document (electronically transmitted)
Jul 19, 2019
Priority document (electronically transmitted)
Jul 19, 2019
Priority document (electronically transmitted)
Jul 19, 2019
Priority document (electronically transmitted)
Jun 27, 2019
Copy of the international search report
Jun 27, 2019
Copy of the translated international search report
Jun 27, 2019
International publication pamphlet

EP3730866

DAIKIN INDUSTRIES

Application Number: EP18892000A
Filing Date: Dec 18, 2018
Status: Granted And Under Opposition; Jun 6, 2025
Publication Date: Jul 9, 2025
External Links: Slate, Register , Google Patents

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Air Conditioner

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Dossier Documents

EP3730866