(19)

(11)

EP 0 112 372 A1

(12)

(43) Date of publication: 04.07.1984 Bulletin 1984/27 (21) Application number: 83902210.0 (22) Date of filing: 06.06.1983

(51) International Patent Classification (IPC):  H01M 4/ 74( . ) (86) International application number: PCT/US1983/000879 (87) International publication number: WO 1984/000185 (19.01.1984 Gazette 1984/02)

(84) Designated Contracting States: AT BE CH DE FR GB LI NL SE (30) Priority: 28.06.1982 US 19820393016 (71) Applicant: THE DOW CHEMICAL COMPANY Midland Michigan 48640-1967 (US)	(72) Inventor: BLACKMON, Allen Dale Russellville, AR 72801 (US) (74) Representative: Weickmann, Heinrich, Dipl.-Ing., et al  Patentanwälte H.Weickmann Dr. K.Fincke F.A.Weickmann B.Huber Dr. H.Liska Dr. J.Prechtel Dr. B.Böhm, Möhlstrasse 22, Postfach 860 820 W-8000 Münch W-8000 Münch (DE)