(19)
(11) EP 2 652 077 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:
11.09.2019 Bulletin 2019/37

(45) Mention of the grant of the patent:
07.08.2019 Bulletin 2019/32

(21) Application number: 11802342.3

(22) Date of filing: 14.12.2011
(51) International Patent Classification (IPC): 
C09K 8/528(2006.01)
C09K 8/72(2006.01)
 C09K 8/86(2006.01)
C09K 8/74(2006.01)
(86) International application number:
PCT/EP2011/072697
(87) International publication number:
WO 2012/080298 (21.06.2012 Gazette 2012/25)

(54)

TREATMENT OF ILLITIC FORMATIONS USING A CHELATING AGENT

BEHANDLUNG VON ILLITISCHEN FORMATIONEN MIT EINEM CHELATBILDNER

TRAITEMENT DE FORMATIONS ILLITIQUES PAR UTILISATION D'UN AGENT DE CHÉLATION

(84) Designated Contracting 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

(30) Priority: 17.12.2010 US 201061424329 P
17.12.2010 US 201061424182 P
17.12.2010 US 201061424271 P
21.01.2011 EP 11151729
21.01.2011 EP 11151725
21.01.2011 EP 11151728
13.06.2011 US 201161496111 P
13.06.2011 US 201161496145 P

(43) Date of publication of application:
23.10.2013 Bulletin 2013/43

(73) Proprietor: Nouryon Chemicals International B.V.
6824BM Arnhem (NL)

(72) Inventors:
  • DE WOLF, Cornelia Adriana
    NL-6961 PC Eerbeek (NL)
  • NASR-EL-DIN MAHMOUD, Mohamed Ahmed
    Dhahran 31261 (SA)
  • NASR-EL-DIN, Hisham
    College Station Texas 77845 (US)

(74) Representative: LKGlobal UK Ltd. 
23 Skylines Village
London E14 9TS
London E14 9TS (GB)


(56) References cited: : 
WO-A1-2008/089262
WO-A1-2009/086954
 WO-A1-2009/024518
WO-A2-2009/137399
   
       
    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).