(19)
(11) EP 4 165 279 B8

(12) CORRECTED EUROPEAN PATENT SPECIFICATION
Note: Bibliography reflects the latest situation

(15) Correction information:
Corrected version no 1 (W1 B1)

(48) Corrigendum issued on:
10.04.2024 Bulletin 2024/15

(45) Mention of the grant of the patent:
21.02.2024 Bulletin 2024/08

(21) Application number: 21733588.4

(22) Date of filing: 04.06.2021
(51) International Patent Classification (IPC): 
E21B 17/08(2006.01)
(52) Cooperative Patent Classification (CPC):
E21B 17/0853; E21B 17/085
(86) International application number:
PCT/NO2021/050142
(87) International publication number:
WO 2021/256937 (23.12.2021 Gazette 2021/51)

(54)

RISER ASSEMBLY

STEIGROHRANORDNUNG

ENSEMBLE COLONNE MONTANTE

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

(30) Priority: 16.06.2020 GB 202009102

(43) Date of publication of application:
19.04.2023 Bulletin 2023/16

(73) Proprietor: Mhwirth AS
4604 Kristiansand (NO)

(72) Inventor:
  • JOHNSEN, John Magne
    1368 Stabekk (NO)

(74) Representative: Zacco Norway AS 
P.O. Box 488 Skøyen
0213 Oslo
0213 Oslo (NO)


(56) References cited: : 
WO-A1-2011/104629
US-A- 4 280 719
US-A1- 2016 258 562
 DE-A1- 2 833 866
US-A1- 2014 151 058
   
       
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).