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 application has been published EP Register Verified

PROCESS FOR THE PREPARATION OF AN ETHER CARBOXYLIC ACID COMPOSITION

Publication No. EP3842407

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App No. EP19219824

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Filed by KAO CHEMICALS GmbH

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Filed on 2019-12-27

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Issued/Published on 2025-12-03

Official EPO Register

Publication No. EP3842407 A1

Application No. EP19219824 Filed: 2019-12-27

Grant Date 2025-12-03 Mention of grant

Active Oppositions 1 Active EPO Oppositions

Patent Abstract / Summary

[0001] The present invention relates to a composition comprising at least an ether carboxylic acid. The present invention also relates to the method for obtaining of the composition and to the use of the composition in industrial applications such as engine oil compositions, metal working compositions, lubricant compositions and oil fuel compositions.

IPC Classifications

C07C51/367, C07C59/125, C11D1/06, C10M105/22

Priority Claims

No priority claims recorded

Designated Contracting States (38 EPC States)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Parties & Representation

Applicants

KAO CHEMICALS GmbH

Kupferstrasse 1, 46446 Emmerich

Inventors (4)

Myrdek, Thomas

c/o Kao Chemicals GmbH, Kupferstrasse 1

Van der Veen, Reinout

c/o Kao Chemicals GmbH, Kupferstrasse 1

Stapels, Michael

c/o Kao Chemicals GmbH, Kupferstrasse 1

Takahashi, Masakatsu

c/o Kao Chemicals Europe, Puig dels Tudons, 10

Representatives / Agents

Hoffmann Eitle

Patent- und Rechtsanwälte PartmbB, Arabellastraße 30

Maiwald GmbH

Elisenhof, Elisenstraße 3

Key Procedural Dates

Request-For-Examination 2021-12-23

Mention Of Grant Published 2025-12-03

First-Examination-Report-Despatched 2023-04-24

Legal Status & Event History

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

57 Events Recorded

Date	Code	Event Description	Auth
2021-06-30	AK	DESIGNATED CONTRACTING STATES	EP
2021-05-28	PUAI	PUBLIC REFERENCE MADE UNDER ARTICLE 153(3) EPC TO A PUBLISHED INTERNATIONAL APPLICATION THAT HAS ENTERED THE EUROPEAN PHASE	EP
2021-05-28	STAA	INFORMATION ON THE STATUS OF AN EP PATENT APPLICATION OR GRANTED EP PATENT	EP
2021-12-31	STAA	INFORMATION ON THE STATUS OF AN EP PATENT APPLICATION OR GRANTED EP PATENT	EP
2022-02-02	17P	REQUEST FOR EXAMINATION FILED	EP
2022-02-02	RBV	DESIGNATED CONTRACTING STATES (CORRECTED)	EP
2023-04-21	STAA	INFORMATION ON THE STATUS OF AN EP PATENT APPLICATION OR GRANTED EP PATENT	EP
2023-05-24	17Q	FIRST EXAMINATION REPORT DESPATCHED	EP
2023-06-14	P01	OPT-OUT OF THE COMPETENCE OF THE UNIFIED PATENT COURT (UPC) REGISTERED	EP
2025-07-03	GRAP	DESPATCH OF COMMUNICATION OF INTENTION TO GRANT A PATENT	EP
2025-07-03	STAA	INFORMATION ON THE STATUS OF AN EP PATENT APPLICATION OR GRANTED EP PATENT	EP
2025-08-06	INTG	INTENTION TO GRANT ANNOUNCED	EP
2025-10-25	GRAS	GRANT FEE PAID	EP
2025-10-31	GRAA	(EXPECTED) GRANT	EP
2025-10-31	STAA	INFORMATION ON THE STATUS OF AN EP PATENT APPLICATION OR GRANTED EP PATENT	EP
2025-12-03	AK	DESIGNATED CONTRACTING STATES	EP
2025-12-03	REG	REFERENCE TO A NATIONAL CODE	EP
2025-12-18	REG	REFERENCE TO A NATIONAL CODE	EP
2025-12-31	REG	REFERENCE TO A NATIONAL CODE	EP
2026-02-04	REG	REFERENCE TO A NATIONAL CODE	EP
2026-03-26	REG	REFERENCE TO A NATIONAL CODE	EP
2026-04-09	PGFP	ANNUAL FEE PAID TO NATIONAL OFFICE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2026-04-10	REG	REFERENCE TO A NATIONAL CODE	EP
2026-04-10	PGFP	ANNUAL FEE PAID TO NATIONAL OFFICE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2026-04-13	PG25	LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2026-04-13	PGFP	ANNUAL FEE PAID TO NATIONAL OFFICE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2026-04-14	PG25	LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2026-04-15	PGFP	ANNUAL FEE PAID TO NATIONAL OFFICE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2026-04-16	PGFP	ANNUAL FEE PAID TO NATIONAL OFFICE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2026-04-17	PG25	LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2026-04-20	PGFP	ANNUAL FEE PAID TO NATIONAL OFFICE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2026-04-24	PG25	LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2026-04-28	PG25	LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2026-04-30	PG25	LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2026-05-15	REG	REFERENCE TO A NATIONAL CODE	EP
2026-06-29	PG25	LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2026-07-03	PG25	LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2026-07-04	PG25	LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2026-07-15	PG25	LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2026-07-17	PG25	LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2026-07-18	PG25	LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2026-07-21	PG25	LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2026-07-23	REG	REFERENCE TO A NATIONAL CODE	EP
2026-07-25	PG25	LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2026-07-28	PG25	LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2026-08-06	PG25	LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2026-08-18	PG25	LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2026-09-04	PLBI	OPPOSITION FILED	EP
2026-09-09	REG	REFERENCE TO A NATIONAL CODE	EP
2026-09-11	PLAB	OPPOSITION DATA, OPPONENT'S DATA OR THAT OF THE OPPONENT'S REPRESENTATIVE MODIFIED	EP
2026-09-15	PLAX	NOTICE OF OPPOSITION AND REQUEST TO FILE OBSERVATION + TIME LIMIT SENT	EP
2026-09-16	REG	REFERENCE TO A NATIONAL CODE	EP
2026-09-03	REG	REFERENCE TO A NATIONAL CODE	EP
2026-10-07	26	OPPOSITION FILED	EP
2026-10-09	PG25	LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP
2026-10-14	R26	OPPOSITION FILED (CORRECTED)	EP
2026-10-13	PG25	LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO]	EP

Patent & Non-Patent Citations

Cited documents and prior art referenced in search and examination reports.

18 Citations

Cited Patent Documents

EP1574560

Espacenet

US4625057

Espacenet

US3992443

Espacenet

EP2902381 2015-08-05

Espacenet

WO2011017637 2011-02-10

Espacenet

WO2009040370 2009-04-02

Espacenet

WO2016079121 2016-05-26

Espacenet

EP0106018 1985-10-23

Espacenet

US7208118 2007-04-24

Espacenet

US5233087 1993-08-03

Espacenet

EP0344442 1993-09-01

Espacenet

EP0716072 1998-01-07

Espacenet

Non-Patent Scientific Literature (NPL)

- "Anionic Surfactants , Organic Chemistry", 1 January 1996, DEKKER , article H MEIJER, ET AL: "Polyether Carboxylates", pages: 313 - 361, XP055760642

- "Ullmanns Encyklopädie der technischen Chemie", 1 January 1982, ISBN: 3527200223, article "Die Tenside", pages: 455 - 467, XP009568840

- KOSSWIG ET AL: "Die Tenside", 1 January 1993, ISBN: 3446162011, article K. KOSSWIG: "2.2 Anionische Tenside", pages: 118 - 123, XP009568839

- SASOL PERFORMANCE CHEMICALS GMBH: "MARLOWET Ether Carboxylic Acids", SASOL.COM, SASOL PERFORMANCE CHEMICALS GMBH, DE, 1 January 2017 (2017-01-01), DE, pages 1 - 2, XP093435872

- D13 - Experimental Report signed by Arjan Gelissen

- Oil field chemicals North America No. 409

Worldwide Patent Family

Related applications and patents in the same INPADOC worldwide family.

10 Family Members

Country	Publication Number	Kind	Publication Date	Action
EP	EP3842407A1	A1	2021-06-30	Espacenet
EP	EP3842407B1	B1	2025-12-03	Espacenet
BR	BR112022012443A2	A2	2022-09-06	Espacenet
CN	CN114867709A	A	2022-08-05	Espacenet
CN	CN114867709B	B	2025-03-21	Espacenet
EP	EP4081501A1	A1	2022-11-02	Espacenet
ES	ES3060444T3	T3	2026-03-26	Espacenet
US	US2023059894A1	A1	2023-02-23	Espacenet
US	US12715834B2	B2	2026-08-25	Espacenet
WO	WO2021130316A1	A1	2021-07-01	Espacenet

Official File Inspection EPC Art. 128 Public Dossier

Complete European Patent Register Dossier (148 Total Documents)

The full inspection file for Application EP19219824 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

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Date: 2026-07-24 Procedure: Examination 0009250

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PROCESS FOR THE PREPARATION OF AN ETHER CARBOXYLIC ACID COMPOSITION

Patent Abstract / Summary

IPC Classifications

Priority Claims

Designated Contracting States (38 EPC States)

Parties & Representation

Applicants

Inventors (4)

Representatives / Agents

Key Procedural Dates

Patent Oppositions

Sasol Germany GmbH

Legal Status & Event History

Patent & Non-Patent Citations

Cited Patent Documents

Non-Patent Scientific Literature (NPL)

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)

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