(19)

(11)

EP 0 111 558 A1

(12)

(43) Date of publication: 27.06.1984 Bulletin 1984/26 (21) Application number: 83902351.0 (22) Date of filing: 05.06.1983

(51) International Patent Classification (IPC):  C01B 31/ 06( . ) C01B 31/ 36( . ) (86) International application number: PCT/US1983/000908 (87) International publication number: WO 1983/004408 (22.12.1983 Gazette 1983/29)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 07.06.1982 US 19820385689 (71) Applicants: HOLCOMBE, Cressie E. Jr. Knoxville, TN 37923 (US) CONDON, James B. Oak Ridge, TN 37830 (US)	(72) Inventors: HOLCOMBE, Cressie E. Jr. Knoxville, TN 37923 (US) CONDON, James B. Oak Ridge, TN 37830 (US) (74) Representative: Grünecker, Kinkeldey, Stockmair & Schwanhäusser Anwaltssozietät  Maximilianstrasse 58 D-80538 München D-80538 München (DE)