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European patent · EP4136322 · In force

Register entry

Publication number
EP4136322
Application number
EP21788482
Kind
European patent with effect for Switzerland and Liechtenstein
Status
In force
Specification
Granted
Filed
Apr 16, 2021
Published
Feb 22, 2023
Granted
Oct 15, 2025
Protection ends at the latest
Apr 15, 2041
Next annual fee due
Apr 30, 2026
IPC classes
E21B 49/00 (2006.01)
E21B 43/00 (2006.01)
E21B 43/16 (2006.01)
Priority
US 202063011414 P 17.04.2020
PCT application
PCT/US2021/027808 16.04.2021
PCT publication
WO2021/212059 21.10.2021
Filing language
English
Source
Swissreg

History

What the Federal Institute of Intellectual Property published about this title, newest first.

  1. Aug 26, 2026

    Change

    Published in Swissreg on 26.08.2026

  2. Oct 15, 2025

    Granted

    Specification status
    Non-published patent application → Granted patent
    Status of protective title
    Initiated → Active

    Published in Swissreg on 15.10.2025

Parties

Inventor

LEE, Seong Hee

Humble, Texas 77396, US

TENE, Matei

Oxfordshire, OT Oxfordshire OX14 4RU, GB

DU, Song

San Ramon, California 94583-2324, US

WEN, Xian-Huan

San Ramon, California 94583-2324, US

EFENDIEV, Yalchin

College Station, Texas 77845, US

The register names each party by name and address. A holder or agent is linked to an organization where exactly one entity of the commercial register bears its name; the street of a party not so recognised is not shown here.