Ostomy Pouch

Patent No. EP4157166 (titled "Ostomy Pouch") was filed by Convatec on Jun 1, 2021. The application was issued on Sep 4, 2024.

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
SALTS HEALTHCARE	May 29, 2025	FORRESTERS

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, 2026
Brief communication - opposition proceedings
Aug 28, 2026
Brief communication - opposition proceedings
Aug 27, 2026
(Electronic) Receipt
Aug 27, 2026
(Electronic) Receipt
Aug 27, 2026
Citation in opposition procedure - 007
Aug 27, 2026
Consolidated list of cited opposition documents
Aug 27, 2026
Letter accompanying subsequently filed items
Aug 27, 2026
Letter accompanying subsequently filed items
Aug 27, 2026
Request for interpreters during oral proceedings
Aug 27, 2026
Written submission in preparation to/during oral proceedings
Jan 21, 2026
Annex to the communication - opposition
Jan 21, 2026
Information concerning oral proceedings
Jan 21, 2026
Scanned annex to a communication - opposition procedure
Jan 21, 2026
Summons to attend oral proceedings
Jan 21, 2026
Summons to attend oral proceedings
Oct 17, 2025
Brief communication - Opposition proceedings
Oct 13, 2025
(Electronic) Receipt
Oct 13, 2025
Auxiliary request during Opposition procedure
Oct 13, 2025
Auxiliary request during Opposition procedure
Oct 13, 2025
Auxiliary request during Opposition procedure
Oct 13, 2025
Auxiliary request during Opposition procedure
Oct 13, 2025
Auxiliary request during Opposition procedure
Oct 13, 2025
Auxiliary request during Opposition procedure
Oct 13, 2025
Auxiliary request during Opposition procedure - 01
Oct 13, 2025
Auxiliary request during Opposition procedure - 02
Oct 13, 2025
Auxiliary request during Opposition procedure - 03
Oct 13, 2025
Auxiliary request during Opposition procedure - 04
Oct 13, 2025
Auxiliary request during Opposition procedure - 05
Oct 13, 2025
Auxiliary request during Opposition procedure - 06
Oct 13, 2025
Citation in opposition procedure - 006
Oct 13, 2025
Consolidated list of cited opposition documents
Oct 13, 2025
Letter accompanying subsequently filed items
Oct 13, 2025
Reply of the patent proprietor to the notice(s) of opposition
Jul 11, 2025
Brief communication - Opposition proceedings
Jul 8, 2025
(Electronic) Receipt
Jul 8, 2025
Letter accompanying subsequently filed items
Jul 8, 2025
Submission concerning change of proprietor's representative
Jul 7, 2025
Brief communication - Opposition proceedings
Jul 7, 2025
Communication confirming withdrawal from representation
Jul 7, 2025
Communication of amended entries concerning the representative
Jun 20, 2025
(Electronic) Receipt
Jun 20, 2025
Letter accompanying subsequently filed items
Jun 20, 2025
Submission concerning change of proprietor's representative
Jun 17, 2025
Communication of a notice of opposition and request to file observations
Jun 17, 2025
Notice of further oppositions to opponent(s)
Jun 4, 2025
Communication of a notice of opposition - first information to patent proprietor
May 29, 2025
(Electronic) Receipt
May 29, 2025
Citation in opposition procedure - 001
May 29, 2025
Citation in opposition procedure - 002
May 29, 2025
Citation in opposition procedure - 003
May 29, 2025
Citation in opposition procedure - 004
May 29, 2025
Citation in opposition procedure - 005
May 29, 2025
Notice of opposition
May 29, 2025
Notice of opposition
May 29, 2025
Notice of opposition
Sep 17, 2024
Transmission of the certificate for a European patent pursuant to Rule 74 EPC
Aug 8, 2024
Decision to grant a European patent
Jul 29, 2024
(Electronic) Receipt
Jul 29, 2024
Filing of the translations of the claims
Jul 29, 2024
French translation of claims
Jul 29, 2024
German translation of the claims
Jul 29, 2024
Letter accompanying subsequently filed items
Apr 19, 2024
Annex to the communication about intention to grant a European patent
Apr 19, 2024
Bibliographic data of the European patent application
Apr 19, 2024
Communication about intention to grant a European patent
Apr 19, 2024
Intention to grant (signatures)
Apr 19, 2024
Text intended for grant (clean copy)
Apr 19, 2024
Text intended for grant (version for approval)
Apr 9, 2024
Examination started
Mar 9, 2023
Notification on forthcoming publication of bibliographic data
Jan 2, 2023
(Electronic) Receipt
Jan 2, 2023
Amended claims filed after receipt of (European) search report
Jan 2, 2023
Amended claims with annotations
Jan 2, 2023
Amended description filed after receipt of (European) search report
Jan 2, 2023
Amended description with annotations
Jan 2, 2023
Amendments received before examination
Jan 2, 2023
Request for entry into the European phase
Dec 12, 2022
Annexes to the international preliminary examination report
Dec 12, 2022
Copy of the international preliminary examination report
Oct 13, 2022
Information on entry into European phase
Jan 10, 2022
Annex to International preliminary examination report
Jan 10, 2022
International preliminary examination report
Jan 10, 2022
International preliminary examination report - free text sheet
Jan 10, 2022
International preliminary examination report - points I-VIII
Jan 10, 2022
Transmittal of International Preliminary Examination Report
Jan 3, 2022
Priority document (electronically transmitted)
Dec 13, 2021
(Electronic) Receipt
Dec 13, 2021
Letter regarding PCTII procedure
Dec 13, 2021
PCT(IPEA): Amended sheet - claims
Dec 13, 2021
PCT(IPEA): Amended sheet - claims
Dec 13, 2021
Reply to communication PCT/IPEA/408
Dec 9, 2021
Copy of the international search report
Dec 9, 2021
Notification of election of EPO
Dec 9, 2021
Published international application - A1
Nov 8, 2021
Written opinion
Nov 8, 2021
Written opinion - free text sheet
Nov 8, 2021
Written opinion - points I-VIII
Nov 4, 2021
Amendments of documents (Article 19 PCT) (without attachments)
Nov 4, 2021
Notification of receipt of demand
Oct 29, 2021
(Electronic) Receipt
Oct 29, 2021
Letter regarding PCTII procedure
Oct 29, 2021
Letter regarding PCTII procedure
Oct 22, 2021
(Electronic) Receipt
Oct 22, 2021
PCT demand form
Oct 22, 2021
PCT(IPEA): Amended sheet - claims
Oct 22, 2021
PCT(IPEA): Amended sheet - claims
Oct 22, 2021
Payment of fees and costs
Oct 22, 2021
Reply to International Search Opinion
Sep 13, 2021
ISR: cited documents
Sep 13, 2021
Written opinion of the ISA, boxes No. I to VIII
Sep 13, 2021
Written opinion of the ISA, cover sheet
Sep 13, 2021
Written opinion of the ISA, supplemental box
Jul 8, 2021
Notification of receipt of Search copy
Jun 15, 2021
Abstract
Jun 15, 2021
Claims
Jun 15, 2021
Description
Jun 15, 2021
Drawings
Jun 15, 2021
Request form for international application (copy for ISA/EP)

EP4157166

CONVATEC

Application Number: EP21734459A
Filing Date: Jun 1, 2021
Status: Granted And Under Opposition; Aug 2, 2024
Publication Date: Sep 4, 2024
External Links: Slate, Register , Google Patents

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EP4157166