(19)
(11) EP 0 020 388 A1

(12)

(43) Date of publication:
07.01.1981 Bulletin 1981/01

(21) Application number: 79901064.0

(22) Date of filing: 17.08.1979
(51) International Patent Classification (IPC): 
B01F 3/ 04( . )
C02F 3/ 20( . )
B01F 7/ 00( . )
 C02F 3/ 16( . )
C02F 7/ 00( . )
B01F 7/ 02( . )
(86) International application number:
PCT/US1979/000619
(87) International publication number:
WO 1980/000435 (20.03.1980 Gazette 1980/06)
(84) Designated Contracting States:
DE FR GB

(30) Priority: 17.08.1978 US 19780934412

(71) Applicants:
  • DURDA, Daniel J.
    Spring Park, MN 55384 (US)
  • QUIGLEY, John T.
    Madison, WI 53705 (US)

(72) Inventors:
  • DURDA, Daniel J.
    Spring Park, MN 55384 (US)
  • QUIGLEY, John T.
    Madison, WI 53705 (US)

   


(54) METHOD FOR TREATING WATER