The patent has been granted The patent has been granted, Grant of patent is intended, Examination is in progress, Request for examination was made, The international publication has been made EP Register Verified

METHOD FOR STRENGTHENING AND REPAIRING HAIR, AND KIT THEREFOR

Publication No. EP3501489

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App No. EP17842531

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Filed by LIW Patent Company limited by guarantee

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Filed on 2017-02-13

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Issued/Published on 2023-11-01

Official EPO Register

Publication No. EP3501489 A1

Application No. EP17842531 Filed: 2017-02-13

Grant Date 2017-02-13 Mention of grant

Active Oppositions 2 Active EPO Oppositions

Patent Abstract / Summary

A method for strengthening and repairing keratin fibres including providing a caustic as well as an acidic crosslinking composition, wherein the caustic crosslinking composition comprises an at least bi-functional Bronsted-base and the acidic crosslinking composition omprises an at least bi-functional Bronsted-acid, and a cosmetically acceptable carrier comprising at least one fatty alcohol; applying the caustic as well as the acidic crosslinking composition to keratin fibres; and optionally mixing the caustic crosslinking composition into a commercially available hair coloring or hair bleaching composition.

IPC Classifications

A61K8/40, A61K8/362, A61K8/34, A61Q5/00, A61K8/41, A61Q5/12 A61K8/40, A61K8/362, A61K8/34, A61Q5/00

Priority Claims

CN 201610701375 Date: 2016-08-22

Designated Contracting States (38 EPC States)

Albania (AL)

Austria (AT)

Belgium (BE)

Bulgaria (BG)

Switzerland (CH)

Cyprus (CY)

Czech Republic (CZ)

Germany (DE)

Denmark (DK)

Estonia (EE)

Spain (ES)

Finland (FI)

France (FR)

United Kingdom (GB)

Greece (GR)

Croatia (HR)

Hungary (HU)

Ireland (IE)

Iceland (IS)

Italy (IT)

Liechtenstein (LI)

Lithuania (LT)

Luxembourg (LU)

Latvia (LV)

Monaco (MC)

North Macedonia (MK)

Malta (MT)

Netherlands (NL)

Norway (NO)

Poland (PL)

Portugal (PT)

Romania (RO)

Serbia (RS)

Sweden (SE)

Slovenia (SI)

Slovakia (SK)

San Marino (SM)

Turkey (TR)

Parties & Representation

Applicants

LIW Patent Company limited by guarantee

Kandoy House, 2 Fairview Strand

Inventors (1)

HOFFMANN, Katherina

3 Beverley PI Werrington County, Sydney, NSW 2747

Representatives / Agents

Meyer-Dulheuer MD Legal Patentanwälte PartG mbB

Hanauer Landstr. 287-289, 60314 Frankfurt am Main

Dr. Meyer-Dulheuer & Partners LLP

Franklinstraße 61-63, 60486 Frankfurt am Main

Klicznik, Alexander, et al

Hogan Lovells Cadwalader International LLP, Dreischeibenhaus 1

Zilly Claude, Felipe Emilio

Hogan Lovells Cadwalader International LLP, Dreischeibenhaus 1

Key Procedural Dates

Request-For-Examination 2019-02-26

Mention Of Grant Published 2017-02-13

First-Examination-Report-Despatched 2021-04-14

Patent Oppositions

Official opposition proceedings filed against European Patent EP3501489 under EPC Article 99.

2 ACTIVE OPPONENTS

Opponent Company

Hogan Lovells International LLP

Kennedydamm 24, DE

Representative

Klicznik, Alexander, et al

Filing Date

2024-07-25

Opposition in Progress

Opponent Company

Olaplex Inc.

1187 Coast Village Road, No.1-520, US

Representative

Zilly Claude, Felipe Emilio

Filing Date

2026-09-07

Opposition in Progress

Legal Status & Event History

Official European Patent Office legal and procedural status changes recorded for this file.

63 Events Recorded

Date	Code	Event Description	Auth
2019-06-26	AK	DESIGNATED CONTRACTING STATES	EP
2019-06-26	AX	REQUEST FOR EXTENSION OF THE EUROPEAN PATENT	EP
2019-06-26	17P	REQUEST FOR EXAMINATION FILED	EP
2019-11-27	DAX	REQUEST FOR EXTENSION OF THE EUROPEAN PATENT (DELETED)	EP
2020-08-12	RIC1	INFORMATION PROVIDED ON IPC CODE ASSIGNED BEFORE GRANT	EP
2020-08-12	A4	SUPPLEMENTARY SEARCH REPORT DRAWN UP AND DESPATCHED	EP
2019-11-27	DAV	REQUEST FOR VALIDATION OF THE EUROPEAN PATENT (DELETED)	EP
2021-04-15	STAA	INFORMATION ON THE STATUS OF AN EP PATENT APPLICATION OR GRANTED EP PATENT	EP
2019-05-27	STAA	INFORMATION ON THE STATUS OF AN EP PATENT APPLICATION OR GRANTED EP PATENT	EP
2018-03-03	STAA	INFORMATION ON THE STATUS OF AN EP PATENT APPLICATION OR GRANTED EP PATENT	EP
2019-05-27	PUAI	PUBLIC REFERENCE MADE UNDER ARTICLE 153(3) EPC TO A PUBLISHED INTERNATIONAL APPLICATION THAT HAS ENTERED THE EUROPEAN PHASE	EP
2021-05-19	17Q	FIRST EXAMINATION REPORT DESPATCHED	EP
2023-05-25	GRAP	DESPATCH OF COMMUNICATION OF INTENTION TO GRANT A PATENT	EP
2023-05-25	STAA	INFORMATION ON THE STATUS OF AN EP PATENT APPLICATION OR GRANTED EP PATENT	EP
2023-06-21	INTG	INTENTION TO GRANT ANNOUNCED	EP
2023-09-19	GRAS	GRANT FEE PAID	EP
2023-09-29	GRAA	(EXPECTED) GRANT	EP
2023-09-29	STAA	INFORMATION ON THE STATUS OF AN EP PATENT APPLICATION OR GRANTED EP PATENT	EP
2023-11-01	AK	DESIGNATED CONTRACTING STATES	EP
2023-11-01	REG	REFERENCE TO A NATIONAL CODE	EP
2023-11-16	REG	REFERENCE TO A NATIONAL CODE	EP
2023-11-15	REG	REFERENCE TO A NATIONAL CODE	EP
2024-01-03	U01	REQUEST FOR UNITARY EFFECT FILED	EP
2024-01-03	U07	UNITARY EFFECT REGISTERED	EP
2023-11-22	REG	REFERENCE TO A NATIONAL CODE	EP
2024-01-29	REG	REFERENCE TO A NATIONAL CODE	EP
2024-03-06	U20	RENEWAL FEE FOR THE EUROPEAN PATENT WITH UNITARY EFFECT PAID	EP
2024-04-08	PG25	LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2024-04-09	PG25	LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2024-04-30	PG25	LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2024-05-14	REG	REFERENCE TO A NATIONAL CODE	EP
2024-05-31	PG25	LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2024-05-31	PGFP	ANNUAL FEE PAID TO NATIONAL OFFICE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2024-01-23	REG	REFERENCE TO A NATIONAL CODE	EP
2024-07-29	PG25	LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2024-07-31	PG25	LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2024-08-02	PLBI	OPPOSITION FILED	EP
2024-08-15	PLAX	NOTICE OF OPPOSITION AND REQUEST TO FILE OBSERVATION + TIME LIMIT SENT	EP
2024-07-25	REG	REFERENCE TO A NATIONAL CODE	EP
2024-09-04	26	OPPOSITION FILED	EP
2024-09-30	PG25	LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2024-10-31	PGFP	ANNUAL FEE PAID TO NATIONAL OFFICE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2024-12-18	PLBB	REPLY OF PATENT PROPRIETOR TO NOTICE(S) OF OPPOSITION RECEIVED	EP
2025-01-24	PG25	LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2025-01-31	PG25	LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2025-04-02	U20	RENEWAL FEE FOR THE EUROPEAN PATENT WITH UNITARY EFFECT PAID	EP
2025-04-25	PGFP	ANNUAL FEE PAID TO NATIONAL OFFICE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2025-08-07	PG25	LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2025-09-03	PG25	LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2025-10-13	PG25	LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2025-10-21	PGFP	ANNUAL FEE PAID TO NATIONAL OFFICE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2025-12-12	PG25	LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2026-01-27	PG25	LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2026-03-25	APAH	APPEAL REFERENCE MODIFIED	EP
2026-03-25	APBP	DATE OF RECEIPT OF NOTICE OF APPEAL RECORDED	EP
2026-06-24	APBQ	DATE OF RECEIPT OF STATEMENT OF GROUNDS OF APPEAL RECORDED	EP
2026-08-24	REG	REFERENCE TO A NATIONAL CODE	EP
2026-08-21	PGFP	ANNUAL FEE PAID TO NATIONAL OFFICE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2026-09-16	REG	REFERENCE TO A NATIONAL CODE	EP
2026-09-30	U21	RENEWAL FEE FOR THE EUROPEAN PATENT WITH UNITARY EFFECT PAID WITH ADDITIONAL FEE	EP
2026-10-10	PGFP	ANNUAL FEE PAID TO NATIONAL OFFICE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2026-10-13	PGFP	ANNUAL FEE PAID TO NATIONAL OFFICE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2026-10-21	PGFP	ANNUAL FEE PAID TO NATIONAL OFFICE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP

Worldwide Patent Family

Related applications and patents in the same INPADOC worldwide family.

9 Family Members

Country	Publication Number	Kind	Publication Date	Action
EP	EP3501489A1	A1	2019-06-26	Espacenet
EP	EP3501489A4	A4	2020-08-12	Espacenet
EP	EP3501489B1	B1	2023-11-01	Espacenet
EP	EP3501489C0	C0	2023-11-01	Espacenet
CN	CN106265109A	A	2017-01-04	Espacenet
DE	DE202017101868U1	U1	2017-07-27	Espacenet
ES	ES2968932T3	T3	2024-05-14	Espacenet
PL	PL3501489T3	T3	2024-03-25	Espacenet
WO	WO2018036105A1	A1	2018-03-01	Espacenet

Official File Inspection EPC Art. 128 Public Dossier

Complete European Patent Register Dossier (148 Total Documents)

The full inspection file for Application EP17842531 contains 148 total documents, including all notices of opposition, proprietor counter-statements, examination communications, third-party observations, and procedural forms. Below are all major recorded procedural filings and publication specifications.

Open 148-Doc Register Dossier

Dossier Filing

Date: 2026-02-21 Procedure: Examination EPIDOSNIDO1

Inspect on Register

METHOD FOR STRENGTHENING AND REPAIRING HAIR, AND KIT THEREFOR

Patent Abstract / Summary

IPC Classifications

Priority Claims

Designated Contracting States (38 EPC States)

Parties & Representation

Applicants

Inventors (1)

Representatives / Agents

Key Procedural Dates

Patent Oppositions

Hogan Lovells International LLP

Olaplex Inc.

Legal Status & Event History

Patent & Non-Patent Citations

Cited Patent Documents

Worldwide Patent Family

Complete European Patent Register Dossier (148 Total Documents)

Recorded Filings & Patent Specifications

European Patent Specification - Granted Patent (B1)

Official European Patent Register Full Dossier

European Patent Application with Search Report (A1)

Oral proceedings

Intervention of assumed infringer

Change: Date of oral proceedings

Deletion: Despatch of minutes of oral proceedings

New entry: Date of receipt of statement of grounds of an appeal

New entry: Payment of appeal fee following opposition

New entry: Date of receipt of notice of appeal

Change: Appeal number

New entry: Despatch of interlocutory decision

New entry: Despatch of minutes of oral proceedings

Interlocutory decision in opposition

Lapse of the patent in a contracting state

Oral proceedings

Lapse of the patent in a contracting state

Lapse of the patent in a contracting state

Lapse of the patent in a contracting state

Lapse of the patent in a contracting state

New entry: Date of oral proceedings

Lapse of the patent in a contracting state

New entry: Reply of patent proprietor to notice(s) of opposition

Lapse of the patent in a contracting state

Invitation to proprietor to file observations on the notice of opposition

New entry: Communication of a notice of opposition and request to file observations + time limit

Lapse of the patent in a contracting state

Opposition filed

Lapse of the patent in a contracting state

Lapse of the patent in a contracting state

Lapse of the patent in a contracting state

Lapse of the patent in a contracting state

(Expected) grant

New entry: Receipt of the translation of the claim(s)

New entry: Payment of fee for grant

New entry: Payment of fee for publishing/printing

Intention to grant the patent

New entry: Communication of intention to grant a patent

New entry: Renewal fee paid

Renewal fee payment

New entry: Reply to examination report

Communication from the examining division

New entry: Renewal fee paid

Renewal fee payment

New entry: Reply to examination report

Communication from the examining division

New entry: Reply to examination report

New entry: Despatch of examination report + time limit

Communication from the examining division

New entry: Reply to examination report

First examination report

New entry: Despatch of examination report + time limit

Communication from the examining division

New entry: Renewal fee paid

Renewal fee payment

Amendment by applicant

Amendments

Change - classification

Supplementary search report

New entry: Decision on request for further processing

New entry: Renewal fee paid