(19)

(11)

EP 0 085 093 A1

(12)

(43) Date of publication: 10.08.1983 Bulletin 1983/32 (21) Application number: 82902610.0 (22) Date of filing: 22.07.1982

(51) International Patent Classification (IPC):  C04B 33/ 32( . ) C04B 35/ 58( . ) C25C 3/ 08( . ) C04B 35/ 52( . ) C04B 35/ 64( . ) (86) International application number: PCT/US1982/001004 (87) International publication number: WO 1983/000325 (03.02.1983 Gazette 1983/04)

(84) Designated Contracting States: AT BE CH DE FR GB LI SE (30) Priority: 27.07.1981 US 19810287125 27.07.1981 US 19810287127 (71) Applicant: GREAT LAKES CARBON CORPORATION New York, NY 10171 (US)	(72) Inventors: JOO, Louis Arpad Johnson City, TN 37601 (US) TUCKER, Kenneth Wayne Elizabethton, TN 37643 (US) WEBB, Scott David Greenville, MS 38701 (US) (74) Representative: Madgwick, Paul Roland, et al  Ladas & Parry Altheimer Eck 2 D-80331 München D-80331 München (DE)