(19)

(11)

EP 0 666 903 A1

(12)

(43) Date of publication: 16.08.1995 Bulletin 1995/33 (21) Application number: 93923255.0 (22) Date of filing: 05.10.1993

(51) International Patent Classification (IPC):  C07K 14/ 62( . ) C12N 15/ 81( . ) (86) International application number: PCT/US1993/009504 (87) International publication number: WO 1994/007994 (14.04.1994 Gazette 1994/09)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 05.10.1992 US 19920956294 (71) Applicant: McKENZIE, Maureen A. Davenport, IA 52804 (US)	(72) Inventor: McKENZIE, Maureen A. Davenport, IA 52804 (US) (74) Representative: Thomson, Paul Anthony  Potts, Kerr & Co. 15, Hamilton Square Birkenhead Merseyside L41 6BR Birkenhead Merseyside L41 6BR (GB)