(19)

(11)

EP 0 318 506 A1

(12)

(43) Date of publication: 07.06.1989 Bulletin 1989/23 (21) Application number: 87905528.0 (22) Date of filing: 12.08.1987

(51) International Patent Classification (IPC):  C30B 29/ 40( . ) C30B 29/ 48( . ) D01D 5/ 00( . ) D01F 9/ 127( . ) C30B 25/ 00( . ) C30B 29/ 62( . ) D01F 9/ 10( . ) D01F 9/ 133( . ) (86) International application number: PCT/US1987/001975 (87) International publication number: WO 1988/001204 (25.02.1988 Gazette 1988/05)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 18.08.1986 US 19860897710 (71) Applicant: CERAMIC RESEARCH, INC. Kansas City, MO 64110 (US)	(72) Inventor: NORDINE, Paul, C. Kansas City, MO 64113 (US) (74) Representative: Eisenführ, Speiser & Partner  Martinistrasse 24 D-28195 Bremen D-28195 Bremen (DE)