(19)
(11) EP 1 492 924 A2

(12)

(88) Date of publication A3:
05.02.2004

(43) Date of publication:
05.01.2005 Bulletin 2005/01

(21) Application number: 03714918.4

(22) Date of filing: 03.04.2003
(51) International Patent Classification (IPC)7D21H 21/02, D21H 23/76
// (D21H17/68, 17:44, 17:54, 17:66)
(86) International application number:
PCT/EP2003/003487
(87) International publication number:
WO 2003/085199 (16.10.2003 Gazette 2003/42)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
Designated Extension States:
AL LT LV MK

(30) Priority: 08.04.2002 US 370653 P

(71) Applicant: Ciba Specialty Chemicals Water Treatments Limited
Bradford,West Yorkshire BD12 0JZ (GB)

(72) Inventors:
  • GRIMSLEY, Swindell, Allen
    Chesapeake, VA 23321 (US)
  • BLAZEY, Matthew, Anthony
    Suffolk, VA 23434 (US)
  • EDMONDS, Christian, Bruce
    Smithfield, VA 23430 (US)
  • WILLIAMS, Stephanie, Caine
    Suffolk, VA 23434 (US)
  • CHEN, Gordon, Cheng, I
    Chesapeake, VA 23321 (US)

   


(54) WHITE PITCH DEPOSIT TREATMENT