Wound Care System For Negative Pressure Therapy

Patent No. EP3781223 (titled "Wound Care System For Negative Pressure Therapy") was filed by Convatec on Oct 18, 2018. The application was issued on Jun 11, 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
CONVATEC	Apr 27, 2023	D YOUNG

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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May 15, 2025
Decision to maintain the European patent in amended form
May 15, 2025
Decision to maintain the European patent in amended form
May 2, 2025
(Electronic) Receipt
May 2, 2025
Filing of the translation of the amended claims
May 2, 2025
French translation of claims
May 2, 2025
German translation of the claims
May 2, 2025
Letter accompanying subsequently filed items
Feb 6, 2025
Communication to opponent concerning maintenance
Feb 6, 2025
Communication with request to file translations
Feb 3, 2025
Maintenance of the patent with the documents specified in the final decision
Oct 28, 2024
Brief communication - Opposition proceedings
Oct 28, 2024
Decision of the Opposition Division and instruction
Oct 28, 2024
Druckexemplar in opposition procedure
Oct 28, 2024
Grounds for the decision (Annex) - opposition
Oct 28, 2024
Interlocutory decision in opposition proceedings
Oct 28, 2024
Means of redress
Oct 28, 2024
Scanned annex to a communication - opposition procedure
Oct 28, 2024
Scanned annex to a communication - opposition procedure
Oct 3, 2024
(Electronic) Receipt
Oct 3, 2024
Letter accompanying subsequently filed items
Oct 3, 2024
Main request during Opposition procedure
Oct 3, 2024
Main request during Opposition procedure
Oct 3, 2024
Reply to an examination report in opposition proceedings
Jul 23, 2024
(Electronic) Receipt
Jul 23, 2024
Amended description with annotations
Jul 23, 2024
Description
Jul 23, 2024
Letter accompanying subsequently filed items
Jul 23, 2024
Main request during Opposition procedure
Jul 23, 2024
Main request during Opposition procedure
Jul 23, 2024
Reply to an examination report in opposition proceedings
May 28, 2024
Annex to the communication - opposition
May 28, 2024
Brief communication - Opposition proceedings
May 28, 2024
Communication inviting the parties to file observations
May 10, 2024
Notification concerning the date of oral proceedings
May 8, 2024
(Electronic) Receipt
May 8, 2024
Communication confirming withdrawal from representation
May 8, 2024
Communication of amended entries concerning the representative
May 8, 2024
Letter accompanying subsequently filed items
May 8, 2024
Letter regarding the opposition procedure (no time limit)
May 3, 2024
(Electronic) Receipt
May 3, 2024
Letter accompanying subsequently filed items
May 3, 2024
Submission concerning change of proprietor's representative
Apr 29, 2024
Communication of the registration of a transfer or change of name and/or address
Apr 23, 2024
(Electronic) Receipt
Apr 23, 2024
Auxiliary request during Opposition procedure
Apr 23, 2024
Auxiliary request during Opposition procedure - 01
Apr 23, 2024
General enquiry
Apr 23, 2024
Letter accompanying subsequently filed items
Apr 23, 2024
Main request during Opposition procedure
Apr 23, 2024
Main request during Opposition procedure
Apr 23, 2024
Submission concerning a transfer of rights (applicant)
Mar 13, 2024
Letter accompanying subsequently filed items
Jan 2, 2024
Advice of delivery
Dec 14, 2023
Annex to the communication - opposition
Dec 14, 2023
Information concerning oral proceedings
Dec 14, 2023
Scanned annex to a communication - opposition procedure
Dec 14, 2023
Summons to attend oral proceedings
Dec 14, 2023
Summons to attend oral proceedings
Dec 14, 2023
Transmittal of decision / summons - opposition
Dec 14, 2023
Transmittal of decision / summons - opposition
Sep 22, 2023
Brief communication - Opposition proceedings
Sep 22, 2023
Rejection of request for extension of time limit
Sep 19, 2023
(Electronic) Receipt
Sep 19, 2023
Letter accompanying subsequently filed items
Sep 19, 2023
Reply of the patent proprietor to the notice(s) of opposition
May 16, 2023
Communication of a notice of opposition and request to file observations
May 16, 2023
Notice of further oppositions to opponent(s)
May 4, 2023
Communication of a notice of opposition - first information to patent proprietor
Apr 27, 2023
(Electronic) Receipt
Apr 27, 2023
Citation in opposition procedure - 001
Apr 27, 2023
Citation in opposition procedure - 002
Apr 27, 2023
Citation in opposition procedure - 003
Apr 27, 2023
Citation in opposition procedure - 004
Apr 27, 2023
Citation in opposition procedure - 005
Apr 27, 2023
Citation in opposition procedure - 005
Apr 27, 2023
Citation in opposition procedure - 006
Apr 27, 2023
Citation in opposition procedure - 007
Apr 27, 2023
Citation in opposition procedure - 007
Apr 27, 2023
Citation in opposition procedure - 008
Apr 27, 2023
Citation in opposition procedure - 009
Apr 27, 2023
Citation in opposition procedure - 010
Apr 27, 2023
Consolidated list of cited opposition documents
Apr 27, 2023
Notice of opposition
Apr 27, 2023
Notice of opposition
Aug 9, 2022
Transmission of the certificate for a European patent pursuant to Rule 74 EPC
Jun 30, 2022
Decision to grant a European patent
Jun 14, 2022
(Electronic) Receipt
Jun 14, 2022
Filing of the translations of the claims
Jun 14, 2022
French translation of claims
Jun 14, 2022
German translation of the claims
Jun 14, 2022
Letter accompanying subsequently filed items
Apr 13, 2022
Bibliographic data of the European patent application
Apr 13, 2022
Communication about intention to grant a European patent
Apr 13, 2022
Intention to grant (signatures)
Apr 13, 2022
Text intended for grant (clean copy)
Apr 13, 2022
Text intended for grant (version for approval)
Feb 28, 2022
Examination started
Jul 1, 2021
Claim deemed abandoned
May 18, 2021
(Electronic) Receipt
May 18, 2021
Letter accompanying subsequently filed items
May 18, 2021
Reply to Written Opinion prepared by the EPO
Jan 27, 2021
Notification on forthcoming publication of bibliographic data
Nov 27, 2020
Priority document (electronically transmitted)
Nov 25, 2020
Communication regarding comments on written opinion/amendment of application/payment of claims fee
Nov 23, 2020
Communication to designated inventor
Nov 23, 2020
Communication to designated inventor
Nov 23, 2020
Communication to designated inventor
Nov 23, 2020
Communication to designated inventor
Nov 18, 2020
Priority search results copy provided by EPO
Oct 29, 2020
(Electronic) Receipt
Oct 29, 2020
Letter concerning fees and payments
Oct 27, 2020
(Electronic) Receipt
Oct 27, 2020
Request for entry into the European phase
Oct 26, 2020
Annexes to the international preliminary examination report
Oct 26, 2020
Copy of the international preliminary examination report
Aug 28, 2020
Information on entry into European phase
Mar 10, 2020
Notification of receipt of demand
Mar 4, 2020
Annex to International preliminary examination report
Mar 4, 2020
International preliminary examination report
Mar 4, 2020
International preliminary examination report - free text sheet
Mar 4, 2020
International preliminary examination report - points I-VIII
Mar 4, 2020
Transmittal of International Preliminary Examination Report
Feb 17, 2020
Notification of election of EPO
Feb 6, 2020
Amendments of documents (Article 19 PCT) (without attachments)
Jan 23, 2020
Notification of receipt of demand
Jan 16, 2020
(Electronic) Receipt
Jan 16, 2020
PCT demand form
Jan 16, 2020
PCT(IPEA): Amended sheet - claims
Jan 16, 2020
PCT(IPEA): Amended sheet - claims
Jan 16, 2020
PCT(IPEA): Amended sheet - description
Jan 16, 2020
PCT(IPEA): Amended sheet - description
Jan 16, 2020
Payment of fees and costs
Jan 16, 2020
Reply to International Search Opinion
Oct 24, 2019
Copy of the international search report
Oct 24, 2019
Published international application - A1
Feb 4, 2019
Communication in cases for which no other form is applicable
Feb 4, 2019
ISR: cover sheet
Jan 29, 2019
ISR: cited documents
Jan 28, 2019
Written opinion of the ISA, boxes No. I to VIII
Jan 28, 2019
Written opinion of the ISA, cover sheet
Jan 28, 2019
Written opinion of the ISA, supplemental box
Jan 9, 2019
(Electronic) Receipt
Jan 9, 2019
Incoming letter related to PCT RO
Jan 9, 2019
Incoming letter related to PCT RO
Jan 9, 2019
Substitute sheet (R26) - Description
Dec 13, 2018
(Electronic) Receipt
Dec 13, 2018
Incoming letter related to PCT RO
Dec 13, 2018
Incoming letter related to PCT RO
Dec 13, 2018
Substitute sheet (R26) - Drawings
Dec 6, 2018
Notification relating to priority claim
Dec 6, 2018
Notification relating to priority claim
Nov 16, 2018
Invitation to correct priority claim
Oct 30, 2018
Notification of receipt of Search copy
Oct 29, 2018
Invitation to correct defects in the international application
Oct 29, 2018
Notification of the international application number and of the international filing date
Oct 24, 2018
Request form for international application (copy for ISA/EP)
Oct 18, 2018
(Electronic) Receipt
Oct 18, 2018
Abstract
Oct 18, 2018
Claims
Oct 18, 2018
Description
Oct 18, 2018
Document concerning fees and payments
Oct 18, 2018
Drawings
Oct 18, 2018
Electronic request for grant of an International application

EP3781223

CONVATEC

Application Number: EP18786352A
Filing Date: Oct 18, 2018
Status: Patent Maintained As Amended; May 9, 2025
Publication Date: Jun 11, 2025
External Links: Slate, Register , Google Patents

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Wound Care System For Negative Pressure Therapy

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Dossier Documents

EP3781223