(19)
(11) EP 0 988 260 A1

(12)

(43) Date of publication:
29.03.2000 Bulletin 2000/13

(21) Application number: 98916727.5

(22) Date of filing: 22.04.1998
(51) International Patent Classification (IPC)7: C04B 28/06, C04B 40/00
// (C04B28/06, 22:06, 22:08, 22:14, 24:00)
(86) International application number:
PCT/CA9800/378
(87) International publication number:
WO 9849/115 (05.11.1998 Gazette 1998/44)
(84) Designated Contracting States:
ES FR IT PT

(30) Priority: 24.04.1997 CA 2203575
24.04.1997 US 41487 P

(71) Applicant: Sungeric International Inc.
Sudbury,Ontario P3E 5C4 (CA)

(72) Inventors:
  • SUN, Henghu
    Sudbury, Ontario P3E 6H1 (CA)
  • LI, Shuqin
    Sudbury, Ontario P3E 6H1 (CA)
  • XU, Weirui
    Beijing 100083 (CN)

(74) Representative: Freischem, Stephan, Dipl.-Ing. 
Patentanwälte FreischemAn Gross St. Martin 2
50667 Köln
50667 Köln (DE)

   


(54) HIGH PULP DENSITY, FAST SETTING AND HIGH EARLY STRENGTH BACKFILL METHOD AND MATERIAL