(19)
(11) EP 0 449 990 A1

(12)

(43) Date of publication:
09.10.1991 Bulletin 1991/41

(21) Application number: 90902580.0

(22) Date of filing: 19.12.1989
(51) International Patent Classification (IPC): 
C04B 35/ 56( . )
C04B 35/ 58( . )
C04B 35/ 645( . )
C04B 35/ 575( . )
C04B 35/ 593( . )
(86) International application number:
PCT/US1989/005838
(87) International publication number:
WO 1990/006906 (28.06.1990 Gazette 1990/15)
(84) Designated Contracting States:
AT BE CH DE ES FR GB IT LI LU NL SE

(30) Priority: 22.12.1988 US 19880288208
13.12.1989 US 19890450200

(71) Applicant: NORTON COMPANY
Worcester, MA 01606-2698 (US)

(72) Inventor:
  • TEWARI, Param, H.
    Hudson, MA 01749 (US)

(74) Representative: Zumstein, Fritz, Dr. 
Patentanwälte, Dr. F. Zumstein, Dipl.-Ing. F. Klingseisen, Bräuhausstrasse 4
D-80331 München
D-80331 München (DE)

   


(54) UNIFORMLY-COATED CERAMIC PARTICLES