(19)

(11)

EP 0 047 314 A1

(12)

(43) Date of publication: 17.03.1982 Bulletin 1982/11 (21) Application number: 81900906.0 (22) Date of filing: 11.03.1981

(51) International Patent Classification (IPC):  C21B 5/ 00( . ) C21B 5/ 06( . ) (86) International application number: PCT/US1981/000326 (87) International publication number: WO 1981/002584 (17.09.1981 Gazette 1981/22)

(84) Designated Contracting States: DE FR GB NL SE (30) Priority: 11.03.1980 US 19800129228 (71) Applicant: JORDAN, Robert K. Pittsburgh, PA 15227 (US)	(72) Inventor: JORDAN, Robert K. Pittsburgh, PA 15227 (US)