Opposition Filed Opposition filed by Siemens Mobility GmbH EP Register Verified

METHOD FOR ESTIMATING A COEFFICIENT OF FRICTION, BRAKE CONTROL METHOD AND BRAKE CONTROL DEVICE FOR A RAIL VEHICLE

Publication No. EP4259496

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App No. EP21824290

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Filed by KNORR-BREMSE Systeme für Schienenfahrzeuge GmbH

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Filed on 2021-11-11

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Issued/Published on 2026-01-21

Official EPO Register

Publication No. EP4259496 A1

Application No. EP21824290 Filed: 2021-11-11

Grant Date 2026-01-21 Mention of grant

Active Oppositions 1 Active EPO Oppositions

Patent Abstract / Summary

Patent abstract is being processed or was not provided in English by the publishing office.

IPC Classifications

B60T8/17, B60T8/172, B60T17/22, F16D66/00

Priority Claims

DE 202010132830 Date: 2020-12-09

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

KNORR-BREMSE Systeme für Schienenfahrzeuge GmbH

Moosacher Strasse 80, 80809 München

Inventors (4)

FURTWÄNGLER, Ralf

81379 München

FRIESEN, Ulf

85579 Neubiberg

MACHANE, Werner

85276 Pfaffenhofen

MACHANE, Walter

85276 Pfaffenhofen

Representatives / Agents

Siemens Patent Attorneys

Postfach 22 16 34, 80506 München

Key Procedural Dates

Request-For-Examination 2023-07-10

Mention Of Grant Published 2026-01-21

First-Examination-Report-Despatched 2025-09-08

Patent Oppositions

Official opposition proceedings filed against European Patent EP4259496 under EPC Article 99.

1 ACTIVE OPPONENT

Opponent Company

Siemens Mobility GmbH

Krauss-Maffei-Straße 2, DE

Representative

Siemens Patent Attorneys

Filing Date

2026-10-15

Opposition in Progress

Patent & Non-Patent Citations

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

15 Citations

Cited Patent Documents

WO2020021665

Espacenet

DE10309933

Espacenet

DE102016115275

Espacenet

DE102006015034

Espacenet

CN103303288

Espacenet

WO2005097572

Espacenet

DE102011111589

Espacenet

DE10328028

Espacenet

WO2019116529

Espacenet

DE112017008276

Espacenet

DE19804570

Espacenet

WO2016079014

Espacenet

DE102015226344

Espacenet

DE102007008929

Espacenet

Non-Patent Scientific Literature (NPL)

LEE NAM-JIN, KANG CHUL-GOO: "The Effect of a Variable Disc Pad Friction Coefficient for the Mechanical Brake System of a Railway Vehicle", PLOS ONE, vol. 10, no. 8, 12 August 2015 (2015-08-12), pages e0135459 - e0135459-18, XP093450791, ISSN: 1932-6203, DOI: 10.1371/journal.pone.0135459 * PLOS ONE | August 12, 2015 Seite 1-18 *

Official File Inspection EPC Art. 128 Public Dossier

Complete European Patent Register Dossier (148 Total Documents)

The full inspection file for Application EP21824290 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: 2026-06-19 Procedure: Examination 0009250

Inspect on Register

METHOD FOR ESTIMATING A COEFFICIENT OF FRICTION, BRAKE CONTROL METHOD AND BRAKE CONTROL DEVICE FOR A RAIL VEHICLE

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

Siemens Mobility 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)

Lapse of the patent in a contracting state

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

Lapse of the patent in a contracting state

Lapse of the patent in a contracting state

Change - inventor

(Expected) grant

New entry: Payment of fee for grant

New entry: Payment of fee for publishing/printing

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

New entry: Renewal fee paid

Renewal fee payment

Intention to grant the patent

New entry: Communication of intention to grant a patent

New entry: Renewal fee paid

Renewal fee payment

Change - extension states

Change: Validation states

New entry: Renewal fee paid

Renewal fee payment

Amendment by applicant

Amendments

Publication in section I.1 EP Bulletin

The date on which the examining division becomes responsible, has been established

Request for examination filed

PCT data prior to European publication

PCT data prior to European publication

Payment of national basic fee

Payment of the first designation fee

Payment of the fee for examination

Date on which the examining division has become responsible

PCT data prior to European publication

PCT data prior to European publication

New entry: applicant or inventor

PCT data prior to European publication

Validation of the patent

Extension of the patent

Language of the procedure

International searching authority

Track Case Updates