(19)

(11)

EP 0 020 472 A1

(12)

(43) Date of publication: 07.01.1981 Bulletin 1981/01 (21) Application number: 79901294.0 (22) Date of filing: 17.09.1979

(51) International Patent Classification (IPC):  A24B 3/ 18( . ) A24B 15/ 20( . ) (86) International application number: PCT/US1979/000772 (87) International publication number: WO 1980/000651 (17.04.1980 Gazette 1980/08)

(84) Designated Contracting States: CH DE NL (30) Priority: 20.09.1978 US 19780944226 (71) Applicant: PHILIP MORRIS INCORPORATED New York, New York 10017 (US)	(72) Inventors: TENG, Daniel Ming-Yi Richmond, VA 23235 (US) SEMP, Bernard Albert Richmond, VA 23234 (US) (74) Representative: Bailey, John William, et al  Reddie & Grose 16 Theobalds Road London WC1X 8PL London WC1X 8PL (GB)